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 (???)                     _/  
 (???)  Library
 (???) _____________________________ 
 (???) ategory: Science - Biology 
 (???) _____________________________ 
 (DIR) A Bilateral Division of the Parietal Bone in a Chimpanzee; with a Spe
       By Hrdlička, Aleš, 1869-1943
 (DIR) A Check-List of the Birds of Idaho
       By Arvey, M. Dale (Martin Dale), 1915-1979; Hall, E. Raymond (Eugene Raymond), 1902-1986 [Editor]; Lane, Henry Higgins, 1878-1965 [Editor]; Taylor, Edward Harrison, 1889-1978 [Editor]
 (DIR) A Civic Biology, Presented in Problems
       By Hunter, George W. (George William), 1873-1948
 (DIR) A Critical Examination of the Position of Mr. Darwin's Work, "On the 
       By Huxley, Thomas Henry, 1825-1895
 (DIR) A Critique of the Theory of Evolution
       By Morgan, Thomas Hunt, 1866-1945
 (DIR) A Defence of the Inquiry into Mesmerism & Phrenology chiefly in relat
       By Armes, William
 (DIR) A Description of the Bar-and-Frame-Hive With an Abstract of Wildman's
       By Munn, William Augustus
 (DIR) A Discourse on the Plague
       By Mead, Richard, 1673-1754
 (DIR) A Dissertation on Horses Wherein It is Demonstrated, by Matters of F
       By Osmer, William
 (DIR) A Distributional Study of the Amphibians of the Isthmus of Tehuantepe
       By Duellman, William Edward, 1930-2022
 (DIR) A Field Study of the Kansas Ant-Eating Frog, Gastrophryne olivacea
       By Fitch, Henry S. (Henry Sheldon), 1909-2009
 (DIR) A Guide for the Dissection of the Dogfish (Squalus Acanthias)
       By Griffin, Lawrence Edmonds, 1874-1949
 (DIR) A Guide for the Study of Animals
       By Whitney, Worrallo; Lucas, Frederic Colby; Shinn, Harold Brough, 1877-; Smallwood, Mabel Elizabeth
 (DIR) A Guide to the Study of Fishes, Volume 1 (of 2)
       By Jordan, David Starr, 1851-1931
 (DIR) A Guide to the Study of Fishes, Volume 2 (of 2)
       By Jordan, David Starr, 1851-1931
 (DIR) A Hand-book to the Primates,  Volume 1 (of 2)
       By Forbes, Henry O. (Henry Ogg), 1851-1932
 (DIR) A Hand-book to the Primates,  Volume 2 (of 2)
       By Forbes, Henry O. (Henry Ogg), 1851-1932
 (DIR) A Handbook of Some South Indian Grasses
       By Rangachari, K.; Tadulinga Mudaliyar, C.
 (DIR) A Historical Account of Useful Inventions and Scientific Discoveries 
       By Grant, George
 (DIR) A History of North American Birds; Land Birds; Vol. 1 of 3
       By Baird, Spencer Fullerton, 1823-1887; Brewer, T. M. (Thomas Mayo), 1814-1880; Ridgway, Robert, 1850-1929
 (DIR) A History of North American Birds; Land Birds; Vol. 2 of 3
       By Baird, Spencer Fullerton, 1823-1887; Brewer, T. M. (Thomas Mayo), 1814-1880; Ridgway, Robert, 1850-1929
 (DIR) A History of North American Birds; Land Birds; Vol. 3 of 3
       By Baird, Spencer Fullerton, 1823-1887; Brewer, T. M. (Thomas Mayo), 1814-1880; Ridgway, Robert, 1850-1929
 (DIR) A History of Science — Volume 1
       By Williams, Henry Smith, 1863-1943; Williams, Edward Huntington, 1868-1944
 (DIR) A History of Science — Volume 2
       By Williams, Henry Smith, 1863-1943; Williams, Edward Huntington, 1868-1944
 (DIR) A History of Science — Volume 4
       By Williams, Henry Smith, 1863-1943; Williams, Edward Huntington, 1868-1944
 (DIR) A History of Science — Volume 5
       By Williams, Henry Smith, 1863-1943; Williams, Edward Huntington, 1868-1944
 (DIR) A Journey in Brazil
       By Agassiz, Louis, 1807-1873; Agassiz, Elizabeth Cabot Cary, 1822-1907
 (DIR) A Letter on Suspended Animation containing experiments shewing that i
       By Hickman, Henry Hill, 1800-1830
 (DIR) A Manual of Conchology According to the System Laid Down by Lamarck,
       By Wyatt, Thomas
 (DIR) A Manual of Philippine Birds
       By McGregor, Richard C. (Richard Crittenden), 1871-1936
 (DIR) A Mechanical Account of Poisons in Several Essays
       By Mead, Richard, 1673-1754
 (DIR) A Mechanico-Physiological Theory of Organic Evolution
       By Nägeli, Carl, 1817-1891
 (DIR) A Monograph of Odontoglossum
       By Bateman, Jas. (James), 1811-1897
 (DIR) A Monograph of the Trilobites of North America: with Coloured Models 
       By Green, Jacob, 1790-1841
 (DIR) A Monograph on the Sub-class Cirripedia (Volume 1 of 2) The Lepadida
       By Darwin, Charles, 1809-1882
 (DIR) A Monograph on the Sub-class Cirripedia (Volume 2 of 2) The Balanidæ,
       By Darwin, Charles, 1809-1882
 (DIR) A Natural History for Young People: Our Animal Friends in Their Nativ
       By Humphreys, Phebe Westcott, -1939
 (DIR) A New Bat (Genus Leptonycteris) From Coahuila
       By Stains, Howard J.
 (DIR) A New Bat (Genus Myotis) From Mexico
       By Dalquest, Walter Woelber, 1917-2000; Hall, E. Raymond (Eugene Raymond), 1902-1986
 (DIR) A New Bat (Genus Pipistrellus) from Northeastern Mexico
       By Baker, Rollin H. (Rollin Harold), 1916-2007
 (DIR) A New Bat (Myotis) From Mexico
       By Hall, E. Raymond (Eugene Raymond), 1902-1986
 (DIR) A New Bog Lemming (Genus Synaptomys) From Nebraska
       By Jones, J. Knox, 1929-1992
 (DIR) A New Chipmunk (Genus Eutamias) from the Black Hills
       By White, John A.
 (DIR) A New Doglike Carnivore, Genus Cynarctus, From the Clarendonian, Plio
       By Hall, E. Raymond (Eugene Raymond), 1902-1986; Dalquest, Walter Woelber, 1917-2000
 (DIR) A New Extinct Emydid Turtle from the Lower Pliocene of Oklahoma
       By Galbreath, Edwin C. (Edwin Carter), 1913-1989
 (DIR) A New Genus of Pennsylvanian Fish (Crossopterygii, Coelacanthiformes)
       By Echols, Joan, 1932-2013
 (DIR) A New Hylid Frog from Eastern Mexico. University of Kansas Publicatio
       By Taylor, Edward Harrison, 1889-1978
 (DIR) A New Long-eared Myotis (Myotis evotis) From Northeastern Mexico
       By Baker, Rollin H. (Rollin Harold), 1916-2007; Stains, Howard J.
 (DIR) A New Name for the Mexican Red Bat
       By Hall, E. Raymond (Eugene Raymond), 1902-1986
 (DIR) A New Order of Fishlike Amphibia From the Pennsylvanian of Kansas
       By Eaton, Theodore H. (Theodore Hildreth), 1907-1981; Stewart, Peggy Lou
 (DIR) A New Piñon Mouse (Peromyscus truei) from Durango, Mexico
       By Finley, Robert B.
 (DIR) A New Pocket Gopher (Genus Thomomys) From Wyoming and Colorado
       By Hall, E. Raymond (Eugene Raymond), 1902-1986
 (DIR) A New Pocket Gopher (Genus Thomomys), from Eastern Colorado
       By Hall, E. Raymond (Eugene Raymond), 1902-1986
 (DIR) A New Pocket Gopher (Thomomys) and A New Spiny Pocket Mouse (Liomys) 
       By Hall, E. Raymond (Eugene Raymond), 1902-1986; Villa Ramírez, Bernardo, 1911-
 (DIR) A New Pocket Mouse (Genus Perognathus) from Kansas
       By Cockrum, E. Lendell, 1920-2009
 (DIR) A New Snake of the Genus Geophis From Chihuahua, Mexico
       By Legler, John M.
 (DIR) A New Species of Frog (Genus Tomodactylus) from Western México
       By Webb, Robert G. (Robert Gravem), 1927-2018
 (DIR) A New Species of Heteromyid Rodent from the Middle Oligocene of North
       By Galbreath, Edwin C. (Edwin Carter), 1913-1989
 (DIR) A New Species of Pocket Gopher (Genus Pappogeomys) From Jalisco, Méxi
       By Russell, Robert J.
 (DIR) A New Species of Wood Rat (Neotoma) from Northeastern Mexico
       By Alvarez, Ticul, 1935-2001
 (DIR) A New Subspecies of Bat (Myotis velifer) from Southeastern California
       By Vaughan, Terry A.
 (DIR) A New Subspecies of Ground Squirrel (Spermophilus spilosoma) from Tam
       By Alvarez, Ticul, 1935-2001
 (DIR) A New Subspecies of Lizard, Cnemidophorus sacki, from Michoacán, Méxi
       By Duellman, William Edward, 1930-2022
 (DIR) A New Subspecies of Microtus montanus from Montana and Comments on Mi
       By Hall, E. Raymond (Eugene Raymond), 1902-1986; Kelson, Keith R.
 (DIR) A New Subspecies of Pocket Mouse from Kansas
       By Hall, E. Raymond (Eugene Raymond), 1902-1986
 (DIR) A New Subspecies of Slider Turtle (Pseudemys scripta) from Coahuila, 
       By Legler, John M.
 (DIR) A New Subspecies of Wood Rat (Neotoma mexicana) from Colorado
       By Finley, Robert B.
 (DIR) A New Subspecies of the Black Myotis (Bat) from Eastern Mexico
       By Hall, E. Raymond (Eugene Raymond), 1902-1986; Alvarez, Ticul, 1935-2001
 (DIR) A New Subspecies of the Fruit-eating Bat, Sturnira ludovici, From Wes
       By Jones, J. Knox, 1929-1992; Phillips, Gary L.
 (DIR) A New Tortoise, Genus Gopherus, From North-central Mexico
       By Legler, John M.
 (DIR) A Population Study of the Prairie Vole (Microtus ochrogaster) in Nort
       By Martin, Edwin Perry, 1922-
 (DIR) A Preliminary Revision of the North American Species of Cactus, Anhal
       By Coulter, John Merle, 1851-1928
 (DIR) A Profitable Instruction of the Perfite Ordering of Bees With the Ma
       By Hill, Thomas, 1528?-
 (DIR) A Quantitative Study of the Nocturnal Migration of Birds
       By Lowery, George H., Jr., 1913-1978
 (DIR) A Report upon the Mollusk Fisheries of Massachusetts
       By Massachusetts. Commissioners on Fisheries and Game; Belding, David Lawrence, 1884-1970
 (DIR) A Review of the Frogs of the Hyla bistincta Group
       By Duellman, William Edward, 1930-2022
 (DIR) A Review of the Middle American Tree Frogs of the Genus Ptychohyla
       By Duellman, William Edward, 1930-2022
 (DIR) A Review of the Systems of Ethics Founded on the Theory of Evolution
       By Williams, Cora May
 (DIR) A Revision of Snakes of the Genus Conophis (Family Colubridae, from M
       By Wellman, John
 (DIR) A Statement of Facts Tending to Establish an Estimate of the True Val
       By Blane, Gilbert, Sir, 1749-1834
 (DIR) A Statistical Inquiry Into the Nature and Treatment of Epilepsy
       By Bennett, Alexander Hughes, 1848-1901
 (DIR) A Synopsis of Neotropical Hylid Frogs, Genus Osteocephalus
       By Trueb, Linda, 1942-; Duellman, William Edward, 1930-2022
 (DIR) A Synopsis of the American Bats of the Genus Pipistrellus
       By Hall, E. Raymond (Eugene Raymond), 1902-1986; Dalquest, Walter Woelber, 1917-2000
 (DIR) A Synopsis of the Birds of North America
       By Audubon, John James, 1785-1851
 (DIR) A Synopsis of the British Mosses Containing Descriptions of All the 
       By Hobkirk, Charles C. P. (Charles Codrington Pressick), 1837-1902
 (DIR) A Synopsis of the North American Lagomorpha
       By Hall, E. Raymond (Eugene Raymond), 1902-1986
 (DIR) A Taxonomic Revision of the Leptodactylid Frog Genus Syrrhophus Cope
       By Lynch, John D.
 (DIR) A Taxonomic Study of the Middle American Snake, Pituophis deppei
       By Duellman, William Edward, 1930-2022
 (DIR) A Text-Book of Horseshoeing, for Horseshoers and Veterinarians
       By Lungwitz, A. (Anton), 1845-1936; Adams, John W. (John William), 1862-1926 [Translator]
 (DIR) A Text-book of Entomology Including the Anatomy, Physiology, Embryol
       By Packard, A. S. (Alpheus Spring), 1839-1905
 (DIR) A Theory of Creation: A Review of 'Vestiges of the Natural History of
       By Bowen, Francis, 1811-1890
 (DIR) A Treatise of Buggs
       By Southall, John; Vandergucht, Gerard, 1697?-1776 [Illustrator]
 (DIR) A Treatise on Physiology and Hygiene For Educational Institutions and
       By Hutchison, Joseph C. (Joseph Chrisman), 1822-1887
 (DIR) A Treatise on the Plague and Yellow Fever With an Appendix, containi
       By Tytler, James, 1745-1804
 (DIR) A bacteriological study of ham souring
       By McBryde, Charles Neil, 1872-
 (DIR) A century of science in America
       By Dana, Edward Salisbury, 1849-1935 [Contributor]; Barrell, Joseph, 1869-1919 [Contributor]; Coe, Wesley R. (Wesley Roswell), 1869-1960 [Contributor]; Foote, H. W. (Harry Ward), 1875-1942 [Contributor]; Ford, William E. (William Ebenezer), 1878-1939 [Contributor]; Goodale, George L. (George Lincoln), 1839-1923 [Contributor]; Gregory, Herbert E. (Herbert Ernest), 1869-1952 [Contributor]; Lull, Richard Swann, 1867-1957 [Contributor]; Page, Leigh, 1884-1952 [Contributor]; Pirsson, Louis V. (Louis Valentine), 1860-1919 [Contributor]; Schuchert, Charles, 1858-1942 [Contributor]; Smith, George Otis, 1871-1944 [Contributor]; Sosman, Robert B. (Robert Browning), 1881-1967 [Contributor]; Wells, Horace L. (Horace Lemuel), 1855-1924 [Contributor]
 (DIR) A conchological manual
       By Sowerby, G. B. (George Brettingham), 1812-1884
 (DIR) A first book in organic evolution
       By Shute, D. Kerfoot (Daniel Kerfoot), 1858-1935
 (DIR) A guide to the shell and starfish galleries
       By British Museum (Natural History). Department of Zoology; Bell, F. J. (Francis Jeffrey), 1855-1924; Kirkpatrick, R. (Randolph), 1863-1950; Smith, E. A. (Edgar Albert), 1847-1916
 (DIR) A handbook of systematic botany
       By Warming, Eugenius, 1841-1924; Knoblauch, Emil, 1864-1936 [Contributor]; Potter, Michael Cresse, 1858- [Translator]
 (DIR) A history of evolution
       By Fenton, Carroll Lane, 1900-1969; Haldeman-Julius, E. (Emanuel), 1888-1951 [Editor]
 (DIR) A history of land mammals in the western hemisphere
       By Scott, William Berryman, 1858-1947
 (DIR) A mechanical and critical enquiry into the nature of hermaphrodites
       By Parsons, James, 1705-1770
 (DIR) A narrative of travels on the Amazon and Rio Negro,
       By Wallace, Alfred Russel, 1823-1913
 (DIR) A study of mushrooms and mushroom spawn
       By Jacob, Edward Henry
 (DIR) A study of some factors influencing fertility and sterility in the bu
       By Gilman, Herbert Lester, 1895-1982
 (DIR) A synopsis of the palms of Puerto Rico
       By Cook, O. F. (Orator Fuller), 1867-1949
 (DIR) A system of practical medicine. By American authors. Vol. 1
       By Pepper, William, 1843-1898 [Editor]; Starr, Louis, 1849-1925 [Editor]
 (DIR) A természettudomány fejlődésének története (1. kötet)
       By Bölsche, Wilhelm, 1861-1939; Schöpflin, Aladár, 1872-1950 [Translator]
 (DIR) A text-book of veterinary anatomy
       By Sisson, Septimus, 1865-1924
 (DIR) A treatise on the esculent funguses of England containing an account
       By Badham, David, 1806-1857; Currey, Frederick, 1819-1881 [Editor]
 (DIR) A treatise on the origin, progress, prevention, and cure of dry rot i
       By Britton, Thomas Allen
 (DIR) ABC's of Science
       By Oliver, Charles A. (Charles Alexander), 1858-1932
 (DIR) Abstracts of Papers Read at the First International Eugenics Congress
       By International Eugenics Congress (1st : 1912 : London)
 (DIR) Account of the Skeleton of the Mammoth A non-descript carnivorous ani
       By Peale, Rembrandt, 1778-1860
 (DIR) Additional Records and Extensions of Known Ranges of Mammals from Uta
       By Durrant, Stephen David, 1902-1975; Hansen, Richard M.; Lee, M. Raymond
 (DIR) Additions to the List of the Birds of Louisiana
       By Lowery, George H., Jr., 1913-1978
 (DIR) Adequate Preparation for the Teacher of Biological Sciences in Second
       By McDonald, J. Daley (James Daley), 1892-
 (DIR) Agricultural zoology
       By Ritzema Bos, J. (Jan), 1850-1928; Ormerod, Eleanor A. (Eleanor Anne), 1828-1901 [Author of introduction, etc.]; Ainsworth Davis, J. R. (James Richard), 1861-1934 [Translator]
 (DIR) Alfred Russel Wallace: Letters and Reminiscences, Vol. 1
       By Wallace, Alfred Russel, 1823-1913; Marchant, James, Sir, 1867-1956
 (DIR) Alfred Russel Wallace: Letters and Reminiscences, Vol. 2
       By Wallace, Alfred Russel, 1823-1913; Marchant, James, Sir, 1867-1956
 (DIR) All about Ferrets and Rats A Complete History of Ferrets, Rats, and 
       By Isaacsen, Adolph
 (DIR) Alpine flora of the Canadian Rocky Mountains
       By Brown, Stewardson, 1867-1921; Schäffer, Mary T. S. (Mary Townsend Sharples), 1861-1939 [Illustrator]
 (DIR) Ameboid movement
       By Schaeffer, Asa A. (Asa Arthur), 1883-1980
 (DIR) American Addresses, with a Lecture on the Study of Biology
       By Huxley, Thomas Henry, 1825-1895
 (DIR) American Forest Trees
       By Gibson, Henry H., 1855-; Maxwell, Hu, 1860-1927 [Editor]
 (DIR) American Pomology. Apples
       By Warder, J. A. (John Aston), 1812-1883
 (DIR) American Weasels
       By Hall, E. Raymond (Eugene Raymond), 1902-1986
 (DIR) Amphibians and Reptiles of the Rainforests of Southern El Petén, Guat
       By Duellman, William Edward, 1930-2022
 (DIR) An Account of the Insects Noxious to Agriculture and Plants in New Ze
       By Maskell, William Miles, 1840-1898
 (DIR) An Account of the Late Improvements in Galvanism With a Series of Cu
       By Aldini, Giovanni, 1762-1834
 (DIR) An Account of the Sore Throat Attended With Ulcers A Disease Which H
       By Fothergill, John, 1712-1780
 (DIR) An Annotated Check List of the Mammals of Michoacán, México
       By Hall, E. Raymond (Eugene Raymond), 1902-1986; Villa Ramírez, Bernardo, 1911-
 (DIR) An Annotated Checklist of Nebraskan Bats
       By Webb, Olin L.; Jones, J. Knox, 1929-1992
 (DIR) An Attempt to Investigate the Seat of Animal Life
       By Curtis, Henry, 1792-1862
 (DIR) An Australian Bird Book: A Pocket Book for Field Use
       By Leach, John Albert, 1870-1929; Tate, Frank, 1864-1939 [Author of introduction, etc.]
 (DIR) An Elementary Study of Insects
       By Haseman, Leonard, 1884-1969
 (DIR) An Elementary Text-book of the Microscope including a description of
       By Griffith, J. W. (John William)
 (DIR) An Essay on the Effects of Opium. Considered as a Poison
       By Awsiter, John, 1734-
 (DIR) An Estimate of the True Value of Vaccination as a Security Against Sm
       By Greenhow, T. M. (Thomas Michael), 1791-1881
 (DIR) An Examination of Weismannism
       By Romanes, George John, 1848-1894
 (DIR) An Experimental Translocation of the Eastern Timber Wolf
       By Weise, Thomas F.; Hook, Richard A.; Mech, L. David; Robinson, William Laughlin, 1933-
 (DIR) An Expository Outline of the "Vestiges of the Natural History of Crea
       By Laing, S. (Samuel), 1812-1897
 (DIR) An Inquiry into the Causes and Effects of the Variolae Vaccinae A Dis
       By Jenner, Edward, 1749-1823
 (DIR) An Introduction to Entomology: Vol. 1 or Elements of the Natural His
       By Kirby, William, 1759-1850; Spence, William, 1783-1860
 (DIR) An Introduction to Entomology: Vol. 2 or Elements of the Natural His
       By Kirby, William, 1759-1850; Spence, William, 1783-1860
 (DIR) An Introduction to Entomology: Vol. 3 or Elements of the Natural His
       By Kirby, William, 1759-1850; Spence, William, 1783-1860
 (DIR) An Introduction to Entomology: Vol. 4 or Elements of the Natural His
       By Kirby, William, 1759-1850; Spence, William, 1783-1860
 (DIR) An Introduction to Nature-study
       By Stenhouse, E. (Ernest)
 (DIR) An Introduction to the History of Science
       By Libby, Walter, 1867-
 (DIR) An account of the manner of inoculating for the small pox in the East
       By Holwell, J. Z. (John Zephaniah), 1711-1798
 (DIR) An anatomical disquisition on the motion of the heart & blood in anim
       By Harvey, William, 1578-1657; Parkyn, Ernest Albert, 1857- [Author of introduction, etc.]; Rhys, Ernest, 1859-1946 [Editor]; Willis, Robert, 1799-1878 [Translator]
 (DIR) An elementary manual of New Zealand entomology
       By Hudson, G. V. (George Vernon), 1867-1946
 (DIR) An essay towards a natural history of serpents
       By Owen, Charles, -1746
 (DIR) An ethical problem; or, Sidelights upon scientific experimentation on
       By Leffingwell, Albert, 1845-1916
 (DIR) An inaugural dissertation on pulmonary consumption
       By Delafield, Edward, 1794-1875
 (DIR) An introduction to the study of fishes
       By Günther, Albert C. L. G. (Albert Carl Ludwig Gotthilf), 1830-1914
 (DIR) An introduction to the study of mammals living and extinct
       By Flower, William Henry, 1831-1899; Lydekker, Richard, 1849-1915
 (DIR) Anatomy of the Cat
       By Reighard, Jacob, 1861-1942; Jennings, H. S. (Herbert Spencer), 1868-1947; Jennings, Louise Burridge [Illustrator]
 (DIR) Ancient Plants Being a Simple Account of the past Vegetation of the 
       By Stopes, Marie Carmichael, 1880-1958
 (DIR) André Michaux's Travels into Kentucky, 1793-96; François André Michau
       By Michaux, André, 1746-1802; Harris, Thaddeus Mason, 1768-1842; Michaux, François André, 1770-1855; Thwaites, Reuben Gold, 1853-1913 [Editor]
 (DIR) Animal Behaviour
       By Morgan, C. Lloyd (Conwy Lloyd), 1852-1936
 (DIR) Animal Castration
       By Liautard, Alexandre François Augustin, 1835-1918
 (DIR) Animal Intelligence The International Scientific Series, Vol. XLIV.
       By Romanes, George John, 1848-1894
 (DIR) Animal Life and Intelligence
       By Morgan, C. Lloyd (Conwy Lloyd), 1852-1936
 (DIR) Animal Life in Field and Garden
       By Fabre, Jean-Henri, 1823-1915; Bicknell, Florence Constable, 1858-1941 [Translator]
 (DIR) Animal Locomotion; or, walking, swimming, and flying With a disserta
       By Pettigrew, James Bell, 1834-1908
 (DIR) Animal Parasites and Messmates
       By Beneden, P. J. van (Pierre Joseph), 1809-1894
 (DIR) Animal intelligence: Experimental studies
       By Thorndike, Edward L. (Edward Lee), 1874-1949
 (DIR) Animal portraiture
       By Lydekker, Richard, 1849-1915; Kuhnert, Wilhelm, 1865-1926 [Artist]
 (DIR) Animals of the Past
       By Lucas, Frederic A. (Frederic Augustus), 1852-1929
 (DIR) Antarctic Penguins: A Study of Their Social Habits
       By Levick, G. Murray (George Murray), 1876-1956
 (DIR) Anthropoid apes
       By Hartmann, Robert, 1831-1893
 (DIR) Antony van Leeuwenhoek, de ontdekker der infusorien, 1675-1875
       By Haaxman, P. J.
 (DIR) Ants and Some Other Insects: An Inquiry Into the Psychic Powers of Th
       By Forel, Auguste, 1848-1931; Wheeler, William Morton, 1865-1937 [Translator]
 (DIR) Apes and Monkeys: Their Life and Language
       By Garner, R. L. (Richard Lynch), 1848-1920
 (DIR) Aphorisms and Reflections from the Works of T. H. Huxley
       By Huxley, Thomas Henry, 1825-1895; Huxley, Henrietta A., -1915 [Editor]
 (DIR) Aphorisms and Reflections from the works of T. H. Huxley
       By Huxley, Thomas Henry, 1825-1895; Huxley, Henrietta A., -1915 [Editor]
 (DIR) Appletons' Popular Science Monthly, April 1899 Volume LIV, No. 6, Apr
       By Various; Youmans, William Jay, 1838-1901 [Editor]
 (DIR) Appletons' Popular Science Monthly, December 1899 Vol. LVI, November,
       By Various; Youmans, William Jay, 1838-1901 [Editor]
 (DIR) Appletons' Popular Science Monthly, February 1899 Volume LIV, No. 4, 
       By Various; Youmans, William Jay, 1838-1901 [Editor]
 (DIR) Appletons' Popular Science Monthly, February 1900 Vol. 56, November, 
       By Various; Youmans, William Jay, 1838-1901 [Editor]
 (DIR) Appletons' Popular Science Monthly, January 1899 Volume LIV, No. 3, J
       By Various; Youmans, William Jay, 1838-1901 [Editor]
 (DIR) Appletons' Popular Science Monthly, July 1899 Volume LV, No. 3, July 
       By Various; Youmans, William Jay, 1838-1901 [Editor]
 (DIR) Appletons' Popular Science Monthly, March 1899 Volume LIV, No. 5, Mar
       By Various; Youmans, William Jay, 1838-1901 [Editor]
 (DIR) Appletons' Popular Science Monthly, March 1900 Vol. 56, Nov. 1899 to
       By Various; Youmans, William Jay, 1838-1901 [Editor]
 (DIR) Appletons' Popular Science Monthly, May, 1900 Vol. 57, May, 1900 to O
       By Various; Cattell, James McKeen, 1860-1944 [Editor]
 (DIR) Appletons' Popular Science Monthly, November 1898 Volume 54, Novembe
       By Various; Youmans, William Jay, 1838-1901 [Editor]
 (DIR) Applied Eugenics
       By Popenoe, Paul, 1888-1979; Johnson, Roswell H. (Roswell Hill), 1877-1967
 (DIR) Arabische Pflanzennamen aus Aegypten, Algerien und Jemen
       By Schweinfurth, Georg August, 1836-1925
 (DIR) Archimedes; or, the future of physics
       By Whyte, Lancelot Law, 1896-1972
 (DIR) Are the Effects of Use and Disuse Inherited? An Examination of the Vi
       By Ball, W. P. (William Platt), 1844-1917
 (DIR) Argentine Ornithology, Volume 1 (of 2) A descriptive catalogue of th
       By Sclater, Philip Lutley, 1829-1913; Hudson, W. H. (William Henry), 1841-1922
 (DIR) Argentine Ornithology, Volume 2 (of 2) A descriptive catalogue of th
       By Sclater, Philip Lutley, 1829-1913; Hudson, W. H. (William Henry), 1841-1922
 (DIR) Aristotle's History of Animals In Ten Books
       By Aristotle, 385 BCE-323 BCE; Schneider, Johann Gottlob, 1750-1822 [Contributor]; Cresswell, Richard, 1815-1882 [Translator]
 (DIR) Aromatics and the Soul: A Study of Smells
       By McKenzie, Dan, 1870-1935
 (DIR) Artistic Anatomy of Animals
       By Cuyer, Édouard, 1852-1929
 (DIR) Aspects of Reproduction and Development in the Prairie Vole (Microtus
       By Fitch, Henry S. (Henry Sheldon), 1909-2009
 (DIR) Aspects of nature, in different lands and different climates (Vol. 2 
       By Humboldt, Alexander von, 1769-1859; Sabine, Elizabeth Juliana, 1807-1879 [Translator]
 (DIR) Aspects of plant life; with special reference to the British flora
       By Praeger, R. Lloyd (Robert Lloyd), 1865-1953
 (DIR) At the Deathbed of Darwinism: A Series of Papers
       By Dennert, Eberhard, 1861-1942; O'Harra, Edwin V. [Translator]; Peschges, John H. [Translator]
 (DIR) Atlas de poche des mammifères de la France, de la Suisse romane et de
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 (DIR) Aus den Tiefen des Weltmeeres Schilderungen von der deutschen Tiefsee
       By Chun, Carl, 1852-1914; Gansberg, Fritz, 1871-1950 [Editor]
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       By Froggatt, Walter W. (Walter Wilson), 1858-1937
 (DIR) Autobiography and Selected Essays
       By Huxley, Thomas Henry, 1825-1895
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       By Frankland, Grace C., 1858-1946
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       By Morley, W. S.
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       By Locy, William A. (William Albert), 1857-1924
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 (DIR) Birds, Illustrated by Color Photography, Vol. 1, No. 6 June, 1897
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 (DIR) Blonde duinen
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 (DIR) Botany for Ladies or, A Popular Introduction to the Natural System o
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 (DIR) British Museum (Natural History) General Guide
       By British Museum (Natural History)
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 (DIR) Buffon's Natural History, Volume 01 (of 10) Containing a Theory of t
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       By Koning, C. J. (Cornelis Johan), 1863-
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       By Seeley, H. G. (Harry Govier), 1839-1909
 (DIR) Drawings and Pharmacy in Al-Zahrawi's 10th-Century Surgical Treatise
       By Hamarneh, Sami Khalaf, 1925-
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       By Sutro, Emil, 1832-1906
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       By Beddard, Frank E. (Frank Evers), 1858-1925
 (DIR) Ecological Observations on the Woodrat, Neotoma floridana
       By Fitch, Henry S. (Henry Sheldon), 1909-2009; Rainey, Dennis G.
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       By Mech, L. David; Frenzel, Louis Daniel; Karns, P. D.; Ream, Robert R.; Winship, John W.
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       By Fitch, Henry S. (Henry Sheldon), 1909-2009; Sandidge, Lewis L.
 (DIR) Educação nova: As bases
       By Alves dos Santos, Augusto Joaquim, 1866-1924
 (DIR) Einheimische Fische; Die Süßwasserfische unsrer Heimat
       By Floericke, Kurt, 1869-1934
 (DIR) El Campesino Puertorriqueño Sus Condiciones Físicas, Intelectuales y
       By Valle Atiles, Francisco del, 1852-1928
 (DIR) Eleanor Ormerod, LL. D., Economic Entomologist : Autobiography and Co
       By Ormerod, Eleanor A. (Eleanor Anne), 1828-1901; Wallace, Robert, 1853-1939 [Editor]
 (DIR) Elementary Botany
       By Atkinson, George Francis, 1854-1918
 (DIR) Elementary Zoology, Second Edition
       By Kellogg, Vernon L. (Vernon Lyman), 1867-1937
 (DIR) Elements of Physiophilosophy
       By Oken, Lorenz, 1779-1851; Tulk, Alfred, -1891 [Translator]
 (DIR) Elements of Structural and Systematic Botany For High Schools and Ele
       By Campbell, Douglas Houghton, 1859-1953
 (DIR) Els aucells més útils a la agricultura de Catalunya
       By Tarré, Emili, 1858-1918
 (DIR) Emanuel Swedenborg's Investigations in Natural Science and the Basis 
       By Ramström, Martin, 1861-1930
 (DIR) Embryology: The Beginnings of Life
       By Leighton, Gerald R. (Gerald Rowley), 1868-
 (DIR) Encyclopaedia Britannica, 11th Edition, "Echinoderma" to "Edward, pri
       By Various
 (DIR) Encyclopaedia Britannica, 11th Edition, "Foraminifera" to "Fox, Edwar
       By Various
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       By Various
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 (DIR) Encyclopaedia Britannica, 11th Edition, "Matter" to "Mecklenburg" Vo
       By Various
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       By Opie, Eugene L. (Eugene Lindsay), 1873-1971; Blake, Francis G. (Francis Gilman), 1887-1952; Rivers, Thomas M. (Thomas Milton), 1888-1962; Small, James C. (James Craig), 1888-
 (DIR) Epidemics Examined and Explained: or, Living Germs Proved by Analogy 
       By Grove, John, 1815-1895
 (DIR) Essays Upon Heredity and Kindred Biological Problems Authorised Trans
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 (DIR) Essays Upon Some Controverted Questions
       By Huxley, Thomas Henry, 1825-1895
 (DIR) Essays in Natural History and Agriculture
       By Garnett, Thomas, 1799-1878
 (DIR) Essays in eugenics
       By Galton, Francis, 1822-1911
 (DIR) Essays of a Biologist
       By Huxley, Julian, 1887-1975
 (DIR) Essays on Darwinism
       By Stebbing, Thomas Roscoe Rede, 1835-1926
 (DIR) Essays on the Microscope Containing a Practical Description of the M
       By Adams, George, 1750-1795; Kanmacher, Frederick [Editor]
 (DIR) Essays: Scientific, Political, & Speculative; Vol. 1 of 3 Library Ed
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       By Pollock, Horatio M. (Horatio Milo), 1868-1950
 (DIR) European Fungus Flora: Agaricaceae
       By Massee, George, 1850-1917
 (DIR) Every Girl's Book
       By Butler, George Frank, 1857-1921
 (DIR) Everyday Objects; Or, Picturesque Aspects of Natural History.
       By Adams, W. H. Davenport (William Henry Davenport), 1828-1891
 (DIR) Evidence as to Man's Place in Nature
       By Huxley, Thomas Henry, 1825-1895
 (DIR) Evolution
       By Hoare, Edward, 1812-1894
 (DIR) Evolution
       By Watson, James A. S. (James Anderson Scott), 1889-1966
 (DIR) Evolution Social and Organic
       By Lewis, Arthur M. (Arthur Morrow), 1873-1922
 (DIR) Evolution and Adaptation
       By Morgan, Thomas Hunt, 1866-1945
 (DIR) Evolution and Classification of the Pocket Gophers of the Subfamily G
       By Russell, Robert J.
 (DIR) Evolution and creation
       By Hardwicke, Herbert Junius
 (DIR) Evolution in Modern Thought
       By Thomson, J. Arthur (John Arthur), 1861-1933 [Contributor]; Bateson, William, 1861-1926 [Contributor]; Bouglé, Célestin Charles Alfred, 1870-1940 [Contributor]; Bury, J. B. (John Bagnell), 1861-1927 [Contributor]; Haeckel, Ernst, 1834-1919 [Contributor]; Høffding, Harald, 1843-1931 [Contributor]; Morgan, C. Lloyd (Conwy Lloyd), 1852-1936 [Contributor]; Schwalbe, Gustav Albert, 1844-1916 [Contributor]; Waggett, P. N. (Philip Napier), 1862-1939 [Contributor]; Weismann, August, 1834-1914 [Contributor]
 (DIR) Evolution made plain
       By Mason, John (John Harmon), 1867-1968; Haldeman-Julius, E. (Emanuel), 1888-1951 [Editor]
 (DIR) Evolution of Life and Form Four lectures delivered at the twenty-thi
       By Besant, Annie, 1847-1933
 (DIR) Evolution, Old & New Or, the Theories of Buffon, Dr. Erasmus Darwin a
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 (DIR) Evolution: An Investigation and a Critique
       By Graebner, Theodore, 1876-1950
 (DIR) Evolution: Its nature, its evidence, and its relation to religious th
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 (DIR) Experimentelle Untersuchungen über die Frage »Ist die Furcht vor Kran
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 (DIR) Experiments on Animals
       By Paget, Stephen, 1855-1926; Lister, Joseph, Baron, 1827-1912 [Author of introduction, etc.]
 (DIR) Experiments on the Nervous System with Opium and Metalline Substances
       By Monro, Alexander, 1733-1817
 (DIR) Explanation of Terms Used in Entomology
       By Smith, John Bernhard, 1858-1912
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       By Anderson, Sydney, 1927-2018
 (DIR) Extinct Monsters A Popular Account of Some of the Larger Forms of An
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 (DIR) Extinct birds
       By Rothschild, Lionel Walter Rothschild, Baron, 1868-1937
 (DIR) Fabre's Book of Insects
       By Fabre, Jean-Henri, 1823-1915; Stawell, Rodolph, Mrs., 1865-1949 [Editor]; Detmold, Edward Julius, 1883-1957 [Illustrator]; Teixeira de Mattos, Alexander, 1865-1921 [Translator]
 (DIR) Facts and Arguments for Darwin
       By Müller, Fritz, 1821-1897; Dallas, W. S. (William Sweetland), 1824-1890 [Translator]
 (DIR) Falling in Love; With Other Essays on More Exact Branches of Science
       By Allen, Grant, 1848-1899
 (DIR) Fathers of Biology
       By McRae, Charles
 (DIR) Fauna der Nassauischen Mollusken
       By Kobelt, Wilhelm, 1840-1916
 (DIR) Fear
       By Mosso, A. (Angelo), 1846-1910; Kiesow, Federico, 1858-1940 [Translator]; Lough, E. [Translator]
 (DIR) Field Mice as Farm and Orchard Pests
       By Lantz, David E. (David Ernest), 1855-1918
 (DIR) Field and Woodland Plants
       By Furneaux, William S.; Wilson, Patten, 1869-1934 [Illustrator]
 (DIR) Field, Forest and Farm Things interesting to young nature-lovers, in
       By Fabre, Jean-Henri, 1823-1915; Bicknell, Florence Constable, 1858-1941 [Translator]
 (DIR) Finger prints
       By Galton, Francis, 1822-1911
 (DIR) First course in biology
       By Bailey, L. H. (Liberty Hyde), 1858-1954; Coleman, Walter Moore, 1863-1926
 (DIR) Fish Populations, Following a Drought, in the Neosho and Marais des C
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       By Metcalf, Artie L.
 (DIR) Fishes of the Big Blue River Basin, Kansas
       By Minckley, W. L., 1935-2001
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       By Deacon, James E., 1934-2015; Metcalf, Artie L.
 (DIR) Fishing Grounds of the Gulf of Maine
       By Rich, Walter H. (Walter Herbert), 1866-
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       By Cross, Frank B. (Frank Bernard), 1925-2001; Minckley, W. L., 1935-2001
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       By Broun, A. F. (Alfred Forbes), 1858-1953; Massey, R. E. (Reginald Ernest); Hutchinson, J. (John), 1884-1972 [Contributor]
 (DIR) Flora von Deutschland Ein Hilfsbuch zum Bestimmen der zwischen den d
       By Schmeil, O. (Otto), 1860-1943; Fitschen, Jost, 1869-1947
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       By Clements, Edith S. (Edith Schwartz), 1874-1971
 (DIR) Flowers of the Southwest Deserts
       By Dodge, Natt N. (Natt Noyes), 1900-1982; Janish, Jeanne R. [Illustrator]
 (DIR) Flytraps and Their Operation [1921]
       By Bishopp, F. C. (Fred Corry), 1884-1970
 (DIR) Flytraps and Their Operation [1930]
       By Bishopp, F. C. (Fred Corry), 1884-1970
 (DIR) Food Habits of the Thrushes of the United States
       By Beal, F. E. L. (Foster Ellenborough Lascelles), 1840-1917
 (DIR) Food Poisoning
       By Jordan, Edwin O. (Edwin Oakes), 1866-1936
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       By Platt, Dwight R., 1931-
 (DIR) Foreign Butterflies
       By Duncan, James, 1804-1861; Jardine, William, 1800-1874 [Editor]
 (DIR) Forest Trees of Illinois: How to Know Them
       By Fuller, George D. (George Damon), 1869-; Mattoon, Wilbur R. (Wilbur Reed), 1875-1941; Miller, Robert B. (Robert Barclay); Nuuttila, E. E.
 (DIR) Forest Trees of Texas: How to Know Them
       By Mattoon, Wilbur R. (Wilbur Reed), 1875-1941; Webster, C. B. (Cyril Bertram), 1898-; Haislet, John A. [Editor]
 (DIR) Form and Function: A Contribution to the History of Animal Morphology
       By Russell, E. S. (Edward Stuart), 1887-1954
 (DIR) Fossil Butterflies Memoirs of the American Association for the Advanc
       By Scudder, Samuel Hubbard, 1837-1911
 (DIR) Fossil plants, Vol. 1
       By Seward, A. C. (Albert Charles), 1863-1941
 (DIR) Fossil plants, Vol. 2
       By Seward, A. C. (Albert Charles), 1863-1941
 (DIR) Fossil plants, Vol. 3
       By Seward, A. C. (Albert Charles), 1863-1941
 (DIR) Four New Pocket Gophers of the Genus Cratogeomys from Jalisco, Mexico
       By Russell, Robert J.
 (DIR) Freedom in Science and Teaching. from the German of Ernst Haeckel
       By Haeckel, Ernst, 1834-1919; Huxley, Thomas Henry, 1825-1895 [Commentator]
 (DIR) Freshwater Sponges, Hydroids & Polyzoa
       By Annandale, Nelson, 1876-1924
 (DIR) From an Easy Chair
       By Lankester, E. Ray (Edwin Ray), Sir, 1847-1929
 (DIR) Fruits of the Hawaiian Islands
       By Wilder, Gerrit Parmile, 1863-1935
 (DIR) Fungi: Their Nature and Uses
       By Cooke, M. C. (Mordecai Cubitt), 1825-1914; Berkeley, M. J. (Miles Joseph), 1803-1889 [Editor]
 (DIR) Galen: On the Natural Faculties
       By Galen; Brock, Arthur John, 1878-1947 [Translator]
 (DIR) Garden Pests in New Zealand A Popular Manual for Practical Gardeners
       By Miller, David, 1890-1973
 (DIR) Genera and Subgenera of Chipmunks
       By White, John A.
 (DIR) Genera of Leptodactylid Frogs in México
       By Lynch, John D.
 (DIR) General Anatomy, Applied to Physiology and Medicine, Vol. 1 (of 3)
       By Bichat, Xavier, 1771-1802; Hayward, George, 1791-1863 [Translator]
 (DIR) General Anatomy, Applied to Physiology and Medicine, Vol. 2 (of 3)
       By Bichat, Xavier, 1771-1802; Hayward, George, 1791-1863 [Translator]
 (DIR) General Anatomy, Applied to Physiology and Medicine, Vol. 3 (of 3)
       By Bichat, Xavier, 1771-1802; Hayward, George, 1791-1863 [Translator]
 (DIR) General Science
       By Clark, Bertha May, 1880-
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       By White, John A.
 (DIR) Geographic Distribution of the Pocket Mouse, Perognathus fasciatus
       By Jones, J. Knox, 1929-1992
 (DIR) Geographic Range of the Hooded Skunk, Mephitis macroura With Descript
       By Hall, E. Raymond (Eugene Raymond), 1902-1986; Dalquest, Walter Woelber, 1917-2000
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       By Cockrum, E. Lendell, 1920-2009; Fitch, Kenneth Leonard, 1929-
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       By Russell, Robert J.; Baker, Rollin H. (Rollin Harold), 1916-2007
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 (DIR) Geschichte der Zoologie
       By Burckhardt, Rudolf, 1866-1908
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       By Harper, John
 (DIR) God and the World: A Survey of Thought
       By Robinson, Arthur William, 1856-1928
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       By Garner, R. L. (Richard Lynch), 1848-1920
 (DIR) Graphic illustrations of abortion and the diseases of menstruation C
       By Granville, A. B. (Augustus Bozzi), 1783-1872
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       By Ward, H. Marshall (Harry Marshall), 1854-1906
 (DIR) Greek Biology & Greek Medicine
       By Singer, Charles, 1876-1960
 (DIR) Grundriß der menschlichen Erblichkeitslehre und Rassenhygiene (1/2) M
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       By Zittel, Karl Alfred von, 1839-1904; Broili, Ferdinand, 1874-1946 [Editor]; Koken, E. (Ernst Friedrich Rudolph Karl), 1860-1912 [Editor]; Schlosser, Max, 1854-1932 [Editor]
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       By Adams, Charles C. (Charles Christopher), 1873-1955
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 (DIR) Half Hours With Modern Scientists: Lectures and Essays
       By Huxley, Thomas Henry, 1825-1895; Barker, George F. (George Frederick), 1835-1910; Cope, E. D. (Edward Drinker), 1840-1897; Stirling, James Hutchison, 1820-1909; Tyndall, John, 1820-1893; Porter, Noah, 1811-1892 [Author of introduction, etc.]
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       By Riley, William A. (William Albert), 1876-; Johannsen, O. A. (Oskar Augustus), 1870-1961
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       By Dame, Lorin Low, 1838-1903; Brooks, Henry M. (Henry Mason), 1822-1898
 (DIR) Handbuch der Pharmakognosie
       By Tschirch, A. (Alexander), 1856-1939
 (DIR) Harvesting Ants and Trap-Door Spiders Notes and Observations on Their
       By Moggridge, John Traherne, 1842-1874
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       By Curtis, John Green, 1844-1913; Lee, Frederic S. (Frederic Schiller), 1859-1939 [Editor]
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       By Fernie, William Thomas, 1830-
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       By Arber, Agnes Robertson, 1879-1960
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       By Duncan, P. Martin (Peter Martin), 1821-1891
 (DIR) Het Leven der Dieren, Deel 3, Hoofdstuk 04: De Insecten
       By Brehm, Alfred Edmund, 1829-1884
 (DIR) Het Leven der Dieren, Deel 3, Hoofdstuk 5: De Spinachtigen
       By Brehm, Alfred Edmund, 1829-1884
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       By Brehm, Alfred Edmund, 1829-1884
 (DIR) Het Leven der Dieren. Deel 3, Hoofdstuk 5: De Amphibiën
       By Brehm, Alfred Edmund, 1829-1884
 (DIR) Het Leven der Dieren. Deel 3. Afdeling 2. De Visschen
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 (DIR) Het Leven der Dieren. Derde Deel, Hoofdstuk 1 tot 4, De Kruipende Die
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       By Brehm, Alfred Edmund, 1829-1884; Huizinga, S. P. [Editor]
 (DIR) Het Leven der Dieren: Deel 1, Hoofdstuk 02: De Halfapen; Hoofdstuk 03
       By Brehm, Alfred Edmund, 1829-1884
 (DIR) Het Leven der Dieren: Deel 1, Hoofdstuk 04: De Roofdieren
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 (DIR) Het Leven der Dieren: Deel 1, Hoofdstuk 05: Robben; Hoofdstuk 06: Ins
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 (DIR) Het Leven der Dieren: Deel 1, Hoofdstuk 11: De Evenvingerigen
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       By Brehm, Alfred Edmund, 1829-1884
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       By Brehm, Alfred Edmund, 1829-1884
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       By Brehm, Alfred Edmund, 1829-1884
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       By Bölsche, Wilhelm, 1861-1939; Goudsmit, B. C. (Boudewijn Casper), 1849-1915 [Translator]
 (DIR) Het paddenstoelenboekje
       By Cool, Cath. (Catharina), 1874-1928; Lek, H. A. A. van der (Hendrik Adrianus Abraham), 1881-1955
 (DIR) Himalayan Journals — Complete Or, Notes of a Naturalist in Bengal, t
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       By Gibault, Georges, 1856-1941
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       By Mansfield, William James, 1878-
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       By Bastin, S. Leonard
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       By Watling, Roy, 1938-; Kenney, Antony [Editor]
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       By Brown, Clair A. (Clair Alan), 1903-1982; Grelen, Harold E.; Jowers, Bryan A. [Illustrator]
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 (DIR) Illustrations of Exotic Entomology, Volume 2
       By Drury, Dru, 1725-1803; Westwood, J. O. (John Obadiah), 1805-1893 [Editor]
 (DIR) Illustrations of Exotic Entomology, Volume 3
       By Drury, Dru, 1725-1803; Westwood, J. O. (John Obadiah), 1805-1893 [Editor]
 (DIR) Illustrations of the Birds of California, Texas, Oregon, British and 
       By Cassin, John, 1813-1869
 (DIR) Illustrations of the birds of Jamaica
       By Gosse, Philip Henry, 1810-1888
 (DIR) Im Zauber des Tierlebens
       By Lucanus, Friedrich von, 1869-1947
 (DIR) Importanza e risultati degli incrociamenti in avicoltura
       By Pascal, Teodoro, 1857-1937
 (DIR) Improved Queen-Rearing; or, How to Rear Large, Prolific, Long-Lived Q
       By Alley, Henry, 1835-1908
 (DIR) In sloot en plas
       By Heimans, Eli, 1861-1914; Thijsse, Jac. P. (Jacobus Pieter), 1865-1945
 (DIR) Index of the Project Gutenberg Works of Charles Darwin
       By Darwin, Charles, 1809-1882; Widger, David, 1932-2021 [Editor]
 (DIR) Inferences from Haunted Houses and Haunted Men
       By Harris, J. W. (John William), 1849-
 (DIR) Influenza
       By Provincial Board of Health of Ontario
 (DIR) Influenza
       By Vaughan, Warren T. (Warren Taylor), 1893-1944
 (DIR) Inheritance of Characteristics in Domestic Fowl
       By Davenport, Charles Benedict, 1866-1944; Morita, Kako [Illustrator]; Toda, Kenji [Illustrator]
 (DIR) Initiative in Evolution
       By Kidd, Walter, 1852-
 (DIR) Inorganic Plant Poisons and Stimulants
       By Brenchley, Winifred Elsie, 1883-1953
 (DIR) Inquiries into human faculty and its development
       By Galton, Francis, 1822-1911
 (DIR) Insect Architecture
       By Rennie, James, 1787-1867; Wood, J. G. (John George), 1827-1889 [Editor]
 (DIR) Insect life: Souvenirs of a naturalist
       By Fabre, Jean-Henri, 1823-1915; Merrifield, F. [Editor]; Parker, M. Prendergast [Illustrator]; Roberts, Margaret, 1833-1919 [Translator]
 (DIR) Insect manufactures
       By Anonymous
 (DIR) Insectivorous Plants
       By Darwin, Charles, 1809-1882
 (DIR) Insects and Diseases A Popular Account of the Way in Which Insects m
       By Doane, Rennie Wilbur, 1871-1942
 (DIR) Insects and Diseases of Trees in the South
       By Anonymous
 (DIR) Intelligence in Plants and Animals Being a New Edition of the Author'
       By Gentry, Thomas G. (Thomas George), 1843-1905
 (DIR) International Weekly Miscellany of Literature, Art and Science — Volu
       By Various
 (DIR) Introduction to the Study of Palæontological Botany
       By Balfour, John Hutton, 1808-1884
 (DIR) Introduction à l'étude de la médecine expérimentale
       By Bernard, Claude, 1813-1878
 (DIR) Irritability
       By Verworn, Max, 1863-1921
 (DIR) Island Life; Or, The Phenomena and Causes of Insular Faunas and Flora
       By Wallace, Alfred Russel, 1823-1913
 (DIR) Jaundice: Its Pathology and Treatment With the Application of Physio
       By Harley, George, 1829-1896
 (DIR) Jaw Musculature of the Mourning and White-winged Doves
       By Merz, Robert L.
 (DIR) Jelly-Fish, Star-Fish, and Sea-Urchins: Being a Research on Primitive
       By Romanes, George John, 1848-1894
 (DIR) Journal of Entomology and Zoology, Vol. 06, No. 4, December 1914
       By Various
 (DIR) Journal of Entomology and Zoology, Vol. 09, No. 1, March 1917
       By Various
 (DIR) Journal of Entomology and Zoology, Vol. 09, No. 3, September 1917
       By Various
 (DIR) Journal of Entomology and Zoology, Vol. 11, No. 1, March 1919
       By Various
 (DIR) Journal of Entomology and Zoology, Vol. 11, No. 2, June 1919
       By Various
 (DIR) Journal of Entomology and Zoology, Vol. 11, No. 4, December 1919
       By Various
 (DIR) Journal of Researches into the Natural History and Geology of the Cou
       By Darwin, Charles, 1809-1882
 (DIR) Journal of a tour in Marocco and the Great Atlas
       By Hooker, Joseph Dalton, 1817-1911; Ball, John, 1818-1889; Maw, George, 1832-1912 [Contributor]
 (DIR) Journal of the Proceedings of the Linnean Society - Vol. 3 Zoology
       By Linnean Society of London
 (DIR) Journal of the Proceedings of the Linnean Society - Vol. 4 Zoology
       By Linnean Society of London
 (DIR) Journals of Travels in Assam, Burma, Bhootan, Afghanistan and the Nei
       By Griffith, William, 1810-1845
 (DIR) Kasvikon oppisanoja
       By Lönnrot, Elias, 1802-1884
 (DIR) Keys to Fungi on Dung
       By Richardson, M. J. (Michael J.), 1938-; Watling, Roy, 1938-
 (DIR) Kyphosis and other Variations in Soft-shelled Turtles
       By Smith, Hobart M. (Hobart Muir), 1912-2013
 (DIR) L'Académie des sciences et les académiciens de 1666 à 1793
       By Bertrand, Joseph, 1822-1900
 (DIR) L'Afrique centrale française
       By Chevalier, Auguste, 1873-1956; Bouvier, E.-L. (Eugène-Louis), 1856-1944 [Contributor]; Courtet, Henri, 1858-1912 [Contributor]; Du Buysson, R. (Robert), 1861-1946 [Contributor]; Germain, Louis, 1878-1942 [Contributor]; Lesne, Pierre, 1871-1949 [Contributor]; Pellegrin, Jacques, 1873-1944 [Contributor]; Petit, Paul, 1834-1913 [Contributor]; Surcouf, J. M. R. (Jacques M. R.), 1873-1934 [Contributor]; Mission Chari-Lac Tchad (1902-1904)
 (DIR) L'idée médicale dans les romans de Paul Bourget
       By Grasset, J. (Joseph), 1849-1918
 (DIR) L'intelligence des fleurs
       By Maeterlinck, Maurice, 1862-1949
 (DIR) La espressione dei sentimenti dei nostri volatili domestici
       By Pascal, Teodoro, 1857-1937
 (DIR) La flore utile du bassin de la Gambie
       By Rançon, A. (André), 1858-1900
 (DIR) La philosophie zoologique avant Darwin
       By Perrier, Edmond, 1844-1921
 (DIR) La simulación en la lucha por la vida
       By Ingenieros, José, 1877-1925
 (DIR) La vie des termites
       By Maeterlinck, Maurice, 1862-1949
 (DIR) La vérité sur le prétendu Silphion de la Cyrénaïque
       By Hérincq, F. (François), 1820-1891
 (DIR) Lachesis Lapponica; Or, A Tour in Lapland, Volume 1
       By Linné, Carl von, 1707-1778; Smith, James Edward, 1759-1828 [Editor]; Troilius, Charles [Translator]
 (DIR) Lajien synty: Luonnollisen valinnan kautta
       By Darwin, Charles, 1809-1882; Koskimies, A. R. [Translator]
 (DIR) Lamarck et son OEuvre
       By Corra, Emile, 1848-1934
 (DIR) Lamarck, the Founder of Evolution: His Life and Work
       By Packard, A. S. (Alpheus Spring), 1839-1905
 (DIR) Lameness of the Horse Veterinary Practitioners' Series, No. 1
       By Lacroix, John Victor, 1882-
 (DIR) Langstroth on the Hive and the Honey-Bee: A Bee Keeper's Manual
       By Langstroth, L. L. (Lorenzo Lorraine), 1810-1895
 (DIR) Last Words on Evolution: A Popular Retrospect and Summary
       By Haeckel, Ernst, 1834-1919; McCabe, Joseph, 1867-1955 [Translator]
 (DIR) Lay Sermons, Addresses and Reviews
       By Huxley, Thomas Henry, 1825-1895
 (DIR) Le Sud-Oranais: études floristiques et phytogéographiques faites au c
       By Hochreutiner, B. P. G. (Bénédict Pierre Georges), 1873-1959; Briquet, John, 1870-1931 [Contributor]; Cardot, Jules, 1860-1934 [Contributor]; Corti, Alfredo, 1880-1973 [Contributor]; Hennings, P. (Paul), 1841-1908 [Contributor]; Migula, W. (Walter), 1863-1938 [Contributor]; Schmidle, W. (Wilhelm), 1860-1951 [Contributor]; Zahlbruckner, Alexander, 1860-1938 [Contributor]
 (DIR) Le Tour du Monde; Voyage d'un naturaliste. Journal des voyages et de
       By Various; Charton, Édouard, 1807-1890 [Editor]
 (DIR) Le livree dei nostri volatili domestici in rapporto allo sport, alla 
       By Pascal, Teodoro, 1857-1937
 (DIR) Le monde de la mer
       By Moquin-Tandon, Alfred, 1804-1863; Lackerbauer, P., 1823-1872 [Illustrator]
 (DIR) Le piante utili dell' Eritrea
       By Schweinfurth, Georg August, 1836-1925
 (DIR) Lectures and Essays
       By Huxley, Thomas Henry, 1825-1895
 (DIR) Lectures and Essays
       By Huxley, Thomas Henry, 1825-1895
 (DIR) Lectures on Evolution Essay #3 from "Science and Hebrew Tradition"
       By Huxley, Thomas Henry, 1825-1895
 (DIR) Lehrbuch der Botanik für Hochschulen
       By Strasburger, Eduard, 1844-1912; Noll, Fritz, 1858-1908; Schenck, H. (Heinrich), 1860-1927; Schimper, A. F. W. (Andreas Franz Wilhelm), 1856-1901
 (DIR) Lehrbuch der Toxikologie für Tierärzte
       By Fröhner, Eugen, 1858-1940
 (DIR) Leprosy
       By Hansen, G. Armauer (Gerhard Armauer), 1841-1912; Looft, Carl, 1863-1943; Walker, Norman, 1862-1942 [Translator]
 (DIR) Les Phénomènes Psychiques Occultes: État Actuel de la Question
       By Coste, Albert, 1895-1985
 (DIR) Les abeilles
       By Pérez, Jean M., 1833-1914
 (DIR) Les grands froids
       By Bouant, Emile, 1847-1926; Weber, Theodore [Illustrator]
 (DIR) Les énigmes de l'Univers
       By Haeckel, Ernst, 1834-1919
 (DIR) Letters of Asa Gray; Vol. 1
       By Gray, Asa, 1810-1888; Gray, Jane Loring, 1821-1909 [Editor]
 (DIR) Letters of Asa Gray; Vol. 2
       By Gray, Asa, 1810-1888; Gray, Jane Loring, 1821-1909 [Editor]
 (DIR) Lichens
       By Smith, Annie Lorrain, 1854-1937
 (DIR) Life History and Ecology of the Five-Lined Skink, Eumeces fasciatus
       By Fitch, Henry S. (Henry Sheldon), 1909-2009
 (DIR) Life History of the Kangaroo Rat
       By Vorhies, Charles Taylor, 1879-1949; Taylor, Walter P. (Walter Penn), 1888-1972
 (DIR) Life Movements in Plants, Volume I
       By Bose, Jagadis Chandra, 1858-1937
 (DIR) Life Movements in Plants, Volume II
       By Bose, Jagadis Chandra, 1858-1937
 (DIR) Life among the butterflies
       By Randolph, Vance, 1892-1980; Haldeman-Julius, E. (Emanuel), 1888-1951 [Editor]; Quinn, Peter [Illustrator]
 (DIR) Life and Letters of Charles Darwin — Volume 1
       By Darwin, Charles, 1809-1882; Darwin, Francis, Sir, 1848-1925 [Editor]
 (DIR) Life and Letters of Charles Darwin — Volume 2
       By Darwin, Charles, 1809-1882; Darwin, Francis, Sir, 1848-1925 [Editor]
 (DIR) Life and Letters of Thomas Henry Huxley — Volume 1
       By Huxley, Thomas Henry, 1825-1895; Huxley, Leonard, 1860-1933 [Editor]
 (DIR) Life and Letters of Thomas Henry Huxley — Volume 3
       By Huxley, Thomas Henry, 1825-1895; Huxley, Leonard, 1860-1933 [Editor]
 (DIR) Life and Matter: A Criticism of Professor Haeckel's "Riddle of the Un
       By Lodge, Oliver, Sir, 1851-1940
 (DIR) Life and death
       By Dastre, A. (Albert), 1844-1917; Greenstreet, W. J. (William John), 1861-1930 [Translator]
 (DIR) Life histories of North American shore birds, Part 1 (of 2)
       By Bent, Arthur Cleveland, 1866-1954
 (DIR) Life histories of North American wood warblers, Part 1 (of 2)
       By Bent, Arthur Cleveland, 1866-1954; Tyler, Winsor Marrett, 1876-1954 [Contributor]
 (DIR) Life histories of North American woodpeckers
       By Bent, Arthur Cleveland, 1866-1954
 (DIR) Life of Charles Darwin
       By Bettany, G. T. (George Thomas), 1850-1891
 (DIR) Life of Elie Metchnikoff, 1845-1916
       By Metchnikoff, Olga; Lankester, E. Ray (Edwin Ray), Sir, 1847-1929 [Author of introduction, etc.]
 (DIR) Life's Dawn on Earth Being the history of the oldest known fossil re
       By Dawson, John William, Sir, 1820-1899
 (DIR) Life: Its True Genesis
       By Flaccus, Horatius, 1816-1885
 (DIR) Links With the Past in the Plant World
       By Seward, A. C. (Albert Charles), 1863-1941
 (DIR) Little Busybodies: The Life of Crickets, Ants, Bees, Beetles, and Oth
       By Marks, Jeannette Augustus, 1875-1964; Moody, Julia, 1869-
 (DIR) Little Masterpieces of Science: Health and Healing
       By Iles, George, 1852-1942 [Editor]
 (DIR) Little Masterpieces of Science: The Naturalist as Interpreter and See
       By Iles, George, 1852-1942 [Editor]
 (DIR) Little Wanderers
       By Morley, Margaret Warner, 1858-1923
 (DIR) Lives of Eminent Zoologists, from Aristotle to Linnæus with Introduct
       By MacGillivray, William, 1796-1852
 (DIR) Living lights
       By Holder, Charles Frederick, 1851-1915; Clément, A.-L. (Armand-Lucien), 1848-1921 [Illustrator]
 (DIR) Louis Agassiz as a Teacher; illustrative extracts on his method of in
       By Cooper, Lane, 1875-1959
 (DIR) Louis Agassiz: His Life and Correspondence
       By Agassiz, Louis, 1807-1873; Agassiz, Elizabeth Cabot Cary, 1822-1907 [Editor]
 (DIR) Louis Pasteur: His Life and Labours
       By Vallery-Radot, René, 1853-1933; Tyndall, John, 1820-1893 [Contributor]; Hamilton, Elizabeth Emma Proby, Lady, 1821-1900 [Translator]
 (DIR) Luck, or Cunning, as the Main Means of Organic Modification
       By Butler, Samuel, 1835-1902
 (DIR) Makers of British Botany; a collection of biographies by living botan
       By Oliver, F. W. (Francis Wall), 1864-1951 [Editor]
 (DIR) Mammals Collected by Dr. W. L. Abbott on the Natuna Islands Proceedin
       By Miller, Gerrit S. (Gerrit Smith), 1869-1956
 (DIR) Mammals Obtained by Dr. Curt von Wedel from the Barrier Beach of Tama
       By Hall, E. Raymond (Eugene Raymond), 1902-1986
 (DIR) Mammals from Southeastern Alaska
       By Baker, Rollin H. (Rollin Harold), 1916-2007; Findley, James S. (James Smith), 1926-
 (DIR) Mammals from Tamaulipas, Mexico
       By Baker, Rollin H. (Rollin Harold), 1916-2007
 (DIR) Mammals of Mesa Verde National Park, Colorado
       By Anderson, Sydney, 1927-2018
 (DIR) Mammals of Northwestern South Dakota
       By Andersen, Kenneth W.; Jones, J. Knox, 1929-1992
 (DIR) Mammals of Washington, Volume 2 University of Kansas Publications Mus
       By Dalquest, Walter Woelber, 1917-2000; Hall, E. Raymond (Eugene Raymond), 1902-1986 [Editor]; Hoffmeister, Donald Frederick, 1916- [Editor]
 (DIR) Mammals of the Grand Mesa, Colorado
       By Anderson, Sydney, 1927-2018
 (DIR) Mammals of the San Gabriel Mountains of California
       By Vaughan, Terry A.
 (DIR) Mammals of the Southwest Mountains and Mesas
       By Olin, George, 1907-; Bierly, Edward, 1920-2004 [Illustrator]
 (DIR) Mammals taken Along the Alaska Highway
       By Baker, Rollin H. (Rollin Harold), 1916-2007
 (DIR) Man And His Ancestor: A Study In Evolution
       By Morris, Charles, 1833-1922
 (DIR) Man's Place in Nature, and Other Essays
       By Huxley, Thomas Henry, 1825-1895; Lodge, Oliver, Sir, 1851-1940 [Author of introduction, etc.]
 (DIR) Man's Place in the Universe A Study of the Results of Scientific Res
       By Wallace, Alfred Russel, 1823-1913
 (DIR) Man, Past and Present
       By Keane, A. H. (Augustus Henry), 1833-1912; Haddon, Alfred C. (Alfred Cort), 1855-1940 [Editor]; Quiggin, A. Hingston (Alison Hingston), 1874-1971 [Editor]
 (DIR) Manual of the Trees of North America (Exclusive of Mexico) 2nd ed.
       By Sargent, Charles Sprague, 1841-1927; Faxon, Charles Edward, 1846-1918 [Illustrator]; Gill, Mary W., 1867-1929 [Illustrator]
 (DIR) Manual of the apiary
       By Cook, Albert John, 1842-1916
 (DIR) Marine Protozoa from Woods Hole Bulletin of the United States Fish Co
       By Calkins, Gary N. (Gary Nathan), 1869-1943
 (DIR) Marvels of Pond-life Or, A Year's Microscopic Recreations Among the 
       By Slack, Henry James, 1818-1896
 (DIR) Marxism and Darwinism
       By Pannekoek, Anton, 1873-1960; Weiser, Nathan [Translator]
 (DIR) Mazedonien
       By Doflein, Franz, 1873-1924
 (DIR) Measles
       By Rucker, William Colby, 1875-
 (DIR) Meeresfische
       By Floericke, Kurt, 1869-1934
 (DIR) Meinauer Naturlehre
       By Wackernagel, Wilhelm, 1806-1869 [Editor]
 (DIR) Memoir on the Dodo (Didus ineptus, Linn.)
       By Owen, Richard, 1804-1892; Broderip, William John, 1789-1859 [Contributor]
 (DIR) Memoirs of the Distinguished Men of Science of Great Britain Living i
       By Walker, William, 1821-; Hunt, Robert, 1807-1887 [Author of introduction, etc.]
 (DIR) Memoria sobre a cultura da Urumbeba e sobre criação da Cochonilha
       By Thiéry de Menonville, Nicolas-Joseph, 1739-1780; Berthollet, Claude-Louis, 1748-1822; Velloso, José Mariano da Conceição, 1742-1811
 (DIR) Memorias sobre a influencia dos descobrimentos portuguezes no conheci
       By Ficalho, Francisco Manuel de Melo, Conde de, 1837-1903
 (DIR) Mendel's principles of heredity: A defence
       By Bateson, William, 1861-1926; Mendel, Gregor, 1822-1884
 (DIR) Mendelism Third Edition
       By Punnett, Reginald Crundall, 1875-1967
 (DIR) Mental Evolution in Man: Origin of Human Faculty
       By Romanes, George John, 1848-1894
 (DIR) Mental Radio
       By Sinclair, Upton, 1878-1968; Einstein, Albert, 1879-1955 [Author of introduction, etc.]; McDougall, William, 1871-1938 [Author of introduction, etc.]; Prince, Walter Franklin, 1863-1934 [Contributor]
 (DIR) Metabolic Adaptation to Climate and Distribution of the Raccoon Procy
       By Mugaas, John N.; Mahlke-Johnson, Kathleen P.; Seidensticker, John
 (DIR) Metapsychical Phenomena: Methods and Observations
       By Maxwell, J. (Joseph), 1858-1938; Lodge, Oliver, Sir, 1851-1940 [Author of introduction, etc.]; Richet, Charles, 1850-1935 [Contributor]; Finch, L. I. (Laura I.) [Translator]
 (DIR) Methods of Destroying Rats
       By Lantz, David E. (David Ernest), 1855-1918
 (DIR) Micrographia Some Physiological Descriptions of Minute Bodies Made by
       By Hooke, Robert, 1635-1703
 (DIR) Middle American Frogs of the Hyla microcephala Group
       By Duellman, William Edward, 1930-2022; Fouquette, M. J.
 (DIR) Migration of Birds (1950)
       By Lincoln, Frederick Charles, 1892-1960; Hines, Bob, 1912-1994 [Illustrator]
 (DIR) Migration of Birds (1979)
       By Lincoln, Frederick Charles, 1892-1960; Peterson, Steven R.; Anastasi, Peter A. [Editor]; Hines, Bob, 1912-1994 [Illustrator]
 (DIR) Mimicry in Butterflies
       By Punnett, Reginald Crundall, 1875-1967
 (DIR) Monism as Connecting Religion and Science A Man of Science
       By Haeckel, Ernst, 1834-1919
 (DIR) More Beetles
       By Fabre, Jean-Henri, 1823-1915; Teixeira de Mattos, Alexander, 1865-1921 [Translator]
 (DIR) More Hunting Wasps
       By Fabre, Jean-Henri, 1823-1915; Teixeira de Mattos, Alexander, 1865-1921 [Translator]
 (DIR) More Letters of Charles Darwin — Volume 1 A Record of His Work in a 
       By Darwin, Charles, 1809-1882; Darwin, Francis, Sir, 1848-1925 [Editor]; Seward, A. C. (Albert Charles), 1863-1941 [Editor]
 (DIR) More Letters of Charles Darwin — Volume 2 A Record of His Work in a 
       By Darwin, Charles, 1809-1882; Darwin, Francis, Sir, 1848-1925 [Editor]; Seward, A. C. (Albert Charles), 1863-1941 [Editor]
 (DIR) Morphological Variation in a Population of the Snake, Tantilla gracil
       By Hardy, Laurence M.; Cole, Charles J.
 (DIR) Mr. Gladstone and Genesis Essay #5 from "Science and Hebrew Traditio
       By Huxley, Thomas Henry, 1825-1895
 (DIR) Mr. Ray's travels, Vol. 2
       By Ray, John, 1627-1705; Rauwolf, Leonhard, 1535-1596; Belon, Pierre, 1517?-1564 [Contributor]; Staphorst, Nicolaus, 1679-1731 [Translator]
 (DIR) Muistelmia hyönteismaailmasta: Kuvauksia hyönteisten tavoista ja vais
       By Fabre, Jean-Henri, 1823-1915; Pulkkinen, Asko [Translator]
 (DIR) Mushroom and Toadstools How to Distinguish Easily the Differences Be
       By Smith, Worthington George, 1835-1917
 (DIR) Mushrooms of America, Edible and Poisonous
       By Palmer, Julius A. (Julius Auboineau), 1840-1899 [Editor]
 (DIR) Mutual Aid: A Factor of Evolution
       By Kropotkin, Petr Alekseevich, kniaz, 1842-1921
 (DIR) Myology and Serology of the Avian Family Fringillidae: A Taxonomic St
       By Stallcup, William B.
 (DIR) Mysteries of Bee-keeping Explained
       By Quinby, M. (Moses), 1810-1875
 (DIR) Narrative of the Circumnavigation of the Globe by the Austrian Frigat
       By Scherzer, Karl, Ritter von, 1821-1903
 (DIR) Natur und Mensch Sechs Abschnitte aus Werken von Ernst Haeckel
       By Haeckel, Ernst, 1834-1919; Neumann, Carl W. (Carl Wilhelm), 1871-1939 [Editor]
 (DIR) Natural History of Cottonmouth Moccasin, Agkistrodon piscovorus (Rept
       By Burkett, Ray D., 1938-
 (DIR) Natural History of the Bell Vireo, Vireo bellii Audubon
       By Barlow, Jon C.
 (DIR) Natural History of the Brush Mouse (Peromyscus boylii) in Kansas With
       By Long, Charles Alan, 1936-
 (DIR) Natural History of the Ornate Box Turtle, Terrapene ornata ornata Aga
       By Legler, John M.
 (DIR) Natural History of the Prairie Vole (Mammalian Genus Microtus) [KU. V
       By Jameson, E. W. (Everett Williams), 1921-; Farner, Donald S. (Donald Sankey), 1915-1988 [Editor]; Hall, E. Raymond (Eugene Raymond), 1902-1986 [Editor]; Lane, Henry Higgins, 1878-1965 [Editor]; Taylor, Edward Harrison, 1889-1978 [Editor]
 (DIR) Natural History of the Racer Coluber constrictor
       By Fitch, Henry S. (Henry Sheldon), 1909-2009
 (DIR) Natural History of the Salamander, Aneides hardii
       By Johnston, Richard F.; Schad, G. A.
 (DIR) Natural Philosophy
       By Ostwald, Wilhelm, 1853-1932; Seltzer, Thomas, 1875?-1943 [Translator]
 (DIR) Natural Wonders
       By Brewster, Edwin Tenney, 1866-1960
 (DIR) Nature readers
       By Wright, Julia McNair, 1840-1903; King, C. S. [Illustrator]
 (DIR) Nature's Teachings: Human Invention Anticipated by Nature
       By Wood, J. G. (John George), 1827-1889
 (DIR) Naturgeschichte des Fasans
       By Anonymous
 (DIR) Neotropical Bats from Western México
       By Anderson, Sydney, 1927-2018
 (DIR) Neotropical Hylid Frogs, Genus Smilisca
       By Duellman, William Edward, 1930-2022; Trueb, Linda, 1942-
 (DIR) Nests and Eggs of Birds of the United States Illustrated
       By Gentry, Thomas G. (Thomas George), 1843-1905
 (DIR) Nests and Eggs of Familiar British Birds, Second Series Described and
       By Adams, H. G. (Henry Gardiner), 1812?-1881
 (DIR) New England Salmon Hatcheries and Salmon Fisheries in the Late 19th C
       By Various
 (DIR) New Subspecies of the Rodent Baiomys from Central America University
       By Packard, Robert L. (Robert Lewis), 1928-
 (DIR) New West Indian Spiders Bulletin of the AMNH, Vol. XXXIII, Art. XLI, 
       By Banks, Nathan, 1868-1953; Leng, Charles W. (Charles William), 1859-1941 [Contributor]; Lutz, Frank Eugene, 1879-1943 [Contributor]
 (DIR) New Zealand Moths and Butterflies (Macro-Lepidoptera)
       By Hudson, G. V. (George Vernon), 1867-1946
 (DIR) New observations on the natural history of bees
       By Huber, François, 1750-1831
 (DIR) New-England's rarities discovered
       By Josselyn, John, active 1630-1675; Tuckerman, Edward, 1817-1886 [Annotator]
 (DIR) Nitrogen Bacteria and Legumes With special reference to red clover, 
       By Hopkins, Cyril G. (Cyril George), 1866-1919
 (DIR) North American Jumping Mice (Genus Zapus)
       By Krutzsch, Philip H. (Philip Henry), 1919-
 (DIR) North American Recent Soft-Shelled Turtles (Family  Trionychidae)
       By Webb, Robert G. (Robert Gravem), 1927-2018
 (DIR) North American Yellow Bats, 'Dasypterus,' and a List of the Named Kin
       By Hall, E. Raymond (Eugene Raymond), 1902-1986; Jones, J. Knox, 1929-1992
 (DIR) Note on the Resemblances and Differences in the Structure and the Dev
       By Huxley, Thomas Henry, 1825-1895; Darwin, Charles, 1809-1882
 (DIR) Notes and Letters on the Natural History of Norfolk More Especially o
       By Browne, Thomas, Sir, 1605-1682
 (DIR) Notes on Diseases of Cattle: Cause, Symptoms and Treatment
       By Korinek, Charles James, 1880-
 (DIR) Notes on Diseases of Swine, Sheep, Poultry and the Dog Cause, Symptom
       By Korinek, Charles James, 1880-
 (DIR) Notes on Philippine Birds Collected by Governor W. Cameron Forbes Bu
       By Bangs, Outram, 1862-1932
 (DIR) Notes on Veterinary Anatomy
       By Korinek, Charles James, 1880-
 (DIR) Notes on the Mammals of Gogebic and Ontonagon Counties, Michigan, 192
       By Dice, Lee R. (Lee Raymond), 1887-1977; Sherman, Harley Bakwel, 1894-
 (DIR) Noteworthy Mammals from Sinaloa, Mexico
       By Jones, J. Knox, 1929-1992; Alvarez, Ticul, 1935-2001; Lee, M. Raymond
 (DIR) Noteworthy Records of Bats From Nicaragua, with a Checklist of the Ch
       By Jones, J. Knox, 1929-1992; Smith, James Dale; Turner, Ronald W.
 (DIR) Noteworthy families (modern science)
       By Galton, Francis, 1822-1911; Schuster, Edgar, 1879-1969
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 (DIR) Scientific American Supplement, No. 455, September 20, 1884
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 (DIR) Scientific American Supplement, No. 520, December 19, 1885
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 (DIR) Scientific American Supplement, No. 595, May 28, 1887
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 (DIR) Scientific American Supplement, No. 598, June 18, 1887
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 (DIR) Scientific American Supplement, No. 601, July 9, 1887
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       By Various
 (DIR) Scientific American Supplement, No. 648, June 2, 1888.
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 (DIR) Scientific American Supplement, No. 664, September 22,1888
       By Various
 (DIR) Scientific American Supplement, No. 711, August 17, 1889
       By Various
 (DIR) Scientific American Supplement, No. 787, January 31, 1891
       By Various
 (DIR) Scientific American Supplement, No. 794, March 21, 1891
       By Various
 (DIR) Scientific American Supplement, No. 795, March 28, 1891
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 (DIR) Scientific American Supplement, No. 799, April 25, 1891
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 (DIR) Scientific American Supplement, No. 810, July 11, 1891
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 (DIR) Scientific American Supplement, No. 829, November 21, 1891
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       By Taylor, Thomas, 1820-1910
 (DIR) Studies in Spermatogenesis (Part 1 of 2)
       By Stevens, N. M. (Nettie Maria), 1861-1912
 (DIR) Studies in Spermatogenesis (Part 2 of 2)
       By Stevens, N. M. (Nettie Maria), 1861-1912
 (DIR) Studies in the Evolutionary Psychology of Feeling
       By Stanley, Hiram Miner
 (DIR) Studies in the History and Method of Science, vol. 1 (of 2)
       By Singer, Charles, 1876-1960 [Editor]; Osler, William, Sir, 1849-1919 [Author of introduction, etc.]
 (DIR) Studies in the Theory of Descent (Volumes 1 and 2)
       By Weismann, August, 1834-1914; Darwin, Charles, 1809-1882 [Author of introduction, etc.]; Meldola, Raphael, 1849-1915 [Translator]
 (DIR) Studies in the Theory of Descent, Volume I
       By Weismann, August, 1834-1914; Darwin, Charles, 1809-1882 [Author of introduction, etc.]; Meldola, Raphael, 1849-1915 [Translator]
 (DIR) Studies in the Theory of Descent, Volume II
       By Weismann, August, 1834-1914; Darwin, Charles, 1809-1882 [Author of introduction, etc.]; Meldola, Raphael, 1849-1915 [Translator]
 (DIR) Studies of American Fungi. Mushrooms, Edible, Poisonous, etc.
       By Atkinson, George Francis, 1854-1918
 (DIR) Studies of Birds Killed in Nocturnal Migration
       By Tordoff, Harrison Bruce, 1923-; Mengel, Robert Morrow, 1921-
 (DIR) Studies of trees in winter
       By Huntington, Annie Oakes, 1875-1940; Sargent, Charles Sprague, 1841-1927 [Author of introduction, etc.]; Morse, Mary S. [Illustrator]
 (DIR) Studies on Epidemic Influenza: Comprising Clinical and Laboratory Inv
       By University of Pittsburgh. School of Medicine
 (DIR) Studies on fermentation
       By Pasteur, Louis, 1822-1895; Faulkner, Frank, 1843-1925 [Translator]; Robb, D. Constable (David Constable) [Translator]
 (DIR) Subspeciation in Pocket Gophers of Kansas, [KU. Vol. 1 No. 11]
       By Villa Ramírez, Bernardo, 1911-; Hall, E. Raymond (Eugene Raymond), 1902-1986
 (DIR) Subspeciation in the Kangaroo Rat, Dipodomys ordii KU. Vol 1 No 23
       By Setzer, Henry W.; Hall, E. Raymond (Eugene Raymond), 1902-1986 [Editor]
 (DIR) Subspeciation in the Meadow Mouse, Microtus montanus, in Wyoming and 
       By Anderson, Sydney, 1927-2018
 (DIR) Subspeciation in the Meadow Mouse, Microtus pennsylvanicus, in Wyomin
       By Anderson, Sydney, 1927-2018
 (DIR) Summer Birds From the Yucatan Peninsula, Mexico
       By Klaas, Erwin E.
 (DIR) Suomen maan Meripedot: maalikuvilla selitetyt
       By Eurén, Gustaf Erik, 1818-1872
 (DIR) Supplement to Harvesting Ants and Trap-Door Spiders
       By Moggridge, John Traherne, 1842-1874; Pickard-Cambridge, Octavius, 1828-1917
 (DIR) Supplement to the catalogue of seals and whales in the British Museum
       By Gray, John Edward, 1800-1875
 (DIR) Sweet-Clover Seed
       By Coe, H. S., 1888-1918; Martin, John N. (John Nathan), 1875-
 (DIR) Syndrome
       By Hoover, Thomas, 1941-
 (DIR) Synopsis of Some Genera of the Large Pyrenomycetes Camillea, Thamnom
       By Lloyd, C. G. (Curtis Gates), 1859-1926
 (DIR) Systematic Status of a South American Frog, Allophryne ruthveni Gaige
       By Lynch, John D.; Freeman, Howard L.
 (DIR) Systematic Status of the Colubrid Snake, Leptodeira discolor Günther
       By Duellman, William Edward, 1930-2022
 (DIR) Systematics of Megachiropteran Bats in the Solomon Islands
       By Phillips, Carleton J.
 (DIR) Säugethiere vom Celebes- und Philippinen-Archipel
       By Meyer, Adolf Bernhard, 1840-1911
 (DIR) Taboo and genetics
       By Knight, Melvin M. (Melvin Moses), 1887-1981; Blanchard, Phyllis, 1895-1986; Peters, Iva Lowther, 1876-1961
 (DIR) Tadarida femorosacca (Merriam) in Tamaulipas, Mexico
       By Dalquest, Walter Woelber, 1917-2000; Hall, E. Raymond (Eugene Raymond), 1902-1986
 (DIR) Taxonomic Notes on Mexican Bats of the Genus Rhogeëssa
       By Hall, E. Raymond (Eugene Raymond), 1902-1986
 (DIR) Taxonomic Status of Some Mice of The Peromyscus boylii Group in Easte
       By Alvarez, Ticul, 1935-2001
 (DIR) Taxonomy and Distribution of Some American Shrews
       By Findley, James S. (James Smith), 1926-
 (DIR) Taxonomy of the Chipmunks, Eutamias quadrivittatus and Eutamias umbri
       By White, John A.
 (DIR) Tentamen Botanicum de Filicum Generibus Dorsiferarum Mémoires de l'Ac
       By Smith, James Edward, 1759-1828
 (DIR) Territory in Bird Life
       By Howard, Henry Eliot, 1873-1940; Grönvold, Henrik, 1858-1940 [Illustrator]; Lodge, George Edward, 1860-1954 [Illustrator]
 (DIR) Texas Honey Plants
       By Sanborn, Charles Emerson, 1877-; Scholl, Ernest E. (Ernest Emmett), 1881-
 (DIR) Text Book of Biology, Part 1: Vertebrata
       By Wells, H. G. (Herbert George), 1866-1946
 (DIR) Text book of veterinary medicine, Volume 1 (of 5)
       By Law, James, 1838-1921
 (DIR) Text book of veterinary medicine, Volume 2 (of 5)
       By Law, James, 1838-1921
 (DIR) Text book of veterinary medicine, Volume 3 (of 5)
       By Law, James, 1838-1921
 (DIR) Text book of veterinary medicine, Volume 4 (of 5)
       By Law, James, 1838-1921
 (DIR) The Academic Gregories
       By Stewart, Agnes Grainger, 1871-1956; Brown, Joseph [Illustrator]
 (DIR) The Adductor Muscles of the Jaw In Some Primitive Reptiles
       By Fox, Richard C.
 (DIR) The American Apiculturist. Vol. III. No. 6, June 15, 1885 A Journal D
       By Various; Locke, Silas M. [Editor]
 (DIR) The American Bee Journal, Vol. VI., Number 5, November 1870
       By Various; Wagner, Samuel [Editor]
 (DIR) The American Bee Journal, Volume VI, Number 3, September 1870
       By Various; Wagner, Samuel [Editor]
 (DIR) The Amphibians and Reptiles of Michoacán, México
       By Duellman, William Edward, 1930-2022
 (DIR) The Anatomy of Vegetables Begun With a General Account of Vegetation 
       By Grew, Nehemiah, 1641-1712
 (DIR) The Anatomy of the Human Peritoneum and Abdominal Cavity Considered f
       By Huntington, George S. (George Sumner), 1861-1927
 (DIR) The Ancestry of Modern Amphibia: A Review of the Evidence
       By Eaton, Theodore H. (Theodore Hildreth), 1907-1981
 (DIR) The Ancient Life History of the Earth A Comprehensive Outline of the
       By Nicholson, Henry Alleyne, 1844-1899
 (DIR) The Animal Parasites of Man
       By Fantham, Harold Benjamin, 1876-1937; Braun, Max, 1850-1930; Stephens, J. W. W. (John William Watson), 1865-1946; Theobald, Fred. V. (Frederick Vincent), 1868-1930; Seifert, Otto, 1853-1933 [Contributor]
 (DIR) The Appendages, Anatomy, and Relationships of Trilobites
       By Raymond, Percy E. (Percy Edward), 1879-1952
 (DIR) The Arctic World
       By Anonymous
 (DIR) The Arena, Volume 18, No. 93, August, 1897
       By Various; Ridpath, John Clark, 1840-1900 [Editor]
 (DIR) The Atom and the Ocean
       By Hull, E. W. Seabrook
 (DIR) The Autobiography of Charles Darwin
       By Darwin, Charles, 1809-1882; Darwin, Francis, Sir, 1848-1925 [Editor]
 (DIR) The Avifauna of Micronesia, Its Origin, Evolution, and Distribution
       By Baker, Rollin H. (Rollin Harold), 1916-2007
 (DIR) The Bacillus of Long Life A Manual of the Preparation and Souring of
       By Douglas, Loudon M., 1864-1944
 (DIR) The Baculum in Microtine Rodents
       By Anderson, Sydney, 1927-2018
 (DIR) The Baculum in the Chipmunks of Western North America
       By White, John A.
 (DIR) The Barren Ground Caribou of Keewatin
       By Harper, Francis, 1886-1972
 (DIR) The Beaked Whales of the Family Ziphiidae An Account of the Beaked W
       By True, Frederick W. (Frederick William), 1858-1914
 (DIR) The Bedbug [1916]
       By Marlatt, C. L., 1863-1954
 (DIR) The Bedbug [1934]
       By Marlatt, C. L., 1863-1954
 (DIR) The Behavior of the Honey Bee in Pollen Collecting
       By Casteel, Dana Brackenridge, 1877-1958
 (DIR) The Biological Problem of To-day: Preformation Or Epigenesis? The Ba
       By Hertwig, Oscar, 1849-1922; Mitchell, P. Chalmers (Peter Chalmers), Sir, 1864-1945 [Translator]
 (DIR) The Biology, Physiology and Sociology of Reproduction Also Sexual Hyg
       By Hall, Winfield Scott, 1861-
 (DIR) The Biotic Associations of Cockroaches
       By Roth, Louis M. (Louis Marcus), 1918-; Willis, Edwin R.
 (DIR) The Bird Book Illustrating in natural colors more than seven hundred
       By Reed, Chester A. (Chester Albert), 1876-1912
 (DIR) The Bird Study Book
       By Pearson, T. Gilbert (Thomas Gilbert), 1873-1943
 (DIR) The Birds of Australia, Vol. 1 of 7
       By Gould, John, 1804-1881
 (DIR) The Birds of Australia, Vol. 2 of 7
       By Gould, John, 1804-1881
 (DIR) The Birds of Australia, Vol. 3 of 7
       By Gould, John, 1804-1881
 (DIR) The Birds of Australia, Vol. 4 of 7
       By Gould, John, 1804-1881
 (DIR) The Birds of Australia, Vol. 5 of 7
       By Gould, John, 1804-1881
 (DIR) The Birds of Washington (Volume 1 of 2) A complete, scientific and p
       By Dawson, William Leon, 1873-1928; Bowles, John Hooper, 1875-1934; Brooks, Allan, 1869-1946 [Illustrator]
 (DIR) The Body at Work: A Treatise on the Principles of Physiology
       By Hill, Alex, 1856-1929
 (DIR) The Book of Love
       By Mantegazza, Paolo, 1831-1910
 (DIR) The Book of Shells Containing the Classes Mollusca, Conchifera, Cirr
       By Society for Promoting Christian Knowledge (Great Britain). Committee of General Literature and Education
 (DIR) The Book of the Pearl The history, art, science, and industry of the 
       By Kunz, George Frederick, 1856-1932; Stevenson, Charles Hugh, 1869-1943
 (DIR) The Botanical Magazine,  Vol. 13 Or, Flower-Garden Displayed
       By Curtis, William, 1746-1799; Sims, John, 1749-1831
 (DIR) The Botanical Magazine, Vol. 01 Or, Flower-Garden Displayed
       By Curtis, William, 1746-1799
 (DIR) The Botanical Magazine, Vol. 02 Or, Flower-Garden Displayed
       By Curtis, William, 1746-1799
 (DIR) The Botanical Magazine, Vol. 03 Or, Flower-Garden Displayed
       By Curtis, William, 1746-1799
 (DIR) The Botanical Magazine, Vol. 05 Or, Flower-Garden Displayed
       By Curtis, William, 1746-1799
 (DIR) The Botanical Magazine, Vol. 06 Or, Flower-Garden Displayed
       By Curtis, William, 1746-1799
 (DIR) The Botanical Magazine, Vol. 07 Or, Flower-Garden Displayed
       By Curtis, William, 1746-1799
 (DIR) The Botanical Magazine, Vol. 08 Or, Flower-Garden Displayed
       By Curtis, William, 1746-1799
 (DIR) The Botanical Magazine, Vol. 09 Or, Flower-Garden Displayed
       By Curtis, William, 1746-1799
 (DIR) The Botanical Magazine, Vol. 10 Or, Flower-Garden Displayed
       By Curtis, William, 1746-1799
 (DIR) The Botanist's Companion, Volume II Or an Introduction to the Knowle
       By Salisbury, William, -1823
 (DIR) The Brain and the Voice in Speech and Song
       By Mott, F. W. (Frederick Walker), 1853-1926
 (DIR) The Brain, A Decoded Enigma
       By Moisa, Dorin Teodor
 (DIR) The Breath of Life
       By Burroughs, John, 1837-1921
 (DIR) The Breeding Birds of Kansas
       By Johnston, Richard F.
 (DIR) The British Woodlice Being a Monograph of the Terrestrial Isopod Cru
       By Webb, Wilfred Mark, 1868-1952; Sillem, Charles
 (DIR) The Butterflies of the British Isles
       By South, Richard
 (DIR) The Butterfly Book A Popular Guide to a Knowledge of the Butterflies 
       By Holland, W. J. (William Jacob), 1848-1932
 (DIR) The Cambridge natural history, Vol. 01 (of 10)
       By Harmer, S. F. (Sidney Frederic), 1862-1950 [Editor]; Hartog, Marcus, 1851-1924; Hickson, Sydney J. (Sydney John), 1859-1940; MacBride, E. W. (Ernest William), 1866-1940; Sollas, Igerna Brünhilda Johnson, 1877-1965; Shipley, A. E. (Arthur Everett), Sir, 1861-1927 [Editor]
 (DIR) The Cambridge natural history, Vol. 02 (of 10)
       By Harmer, S. F. (Sidney Frederic), 1862-1950 [Editor]; Beddard, Frank E. (Frank Evers), 1858-1925; Benham, W. B. (William Blaxland), 1860-1950; Gamble, F. W. (Frederick William), 1869-1926; Hartog, Marcus, 1851-1924; Sheldon, Lilian, 1862-1942; Shipley, A. E. (Arthur Everett), Sir, 1861-1927 [Editor]
 (DIR) The Cambridge natural history, Vol. 03 (of 10)
       By Harmer, S. F. (Sidney Frederic), 1862-1950 [Editor]; Cooke, A. H. (Alfred Hands), 1854-1934; Reed, F. R. C. (Frederick Richard Cowper), 1869-1946; Shipley, A. E. (Arthur Everett), Sir, 1861-1927 [Editor]
 (DIR) The Cambridge natural history, Vol. 04 (of 10)
       By Harmer, S. F. (Sidney Frederic), 1862-1950 [Editor]; Smith, Geoffrey, 1881-1916; Thompson, D'Arcy Wentworth, 1860-1948; Warburton, Cecil, 1854-1958; Weldon, Walter Frank Raphael, 1860-1906; Woods, Henry, 1868-1952; Shipley, A. E. (Arthur Everett), Sir, 1861-1927 [Editor]
 (DIR) The Cambridge natural history, Vol. 05 (of 10)
       By Harmer, S. F. (Sidney Frederic), 1862-1950 [Editor]; Sedgwick, Adam, 1854-1913; Sharp, David, 1840-1922; Sinclair, F. G. (Frederick Granville), 1858-1914; Shipley, A. E. (Arthur Everett), Sir, 1861-1927 [Editor]
 (DIR) The Cambridge natural history, Vol. 06 (of 10)
       By Harmer, S. F. (Sidney Frederic), 1862-1950 [Editor]; Sharp, David, 1840-1922; Shipley, A. E. (Arthur Everett), Sir, 1861-1927 [Editor]
 (DIR) The Cambridge natural history, Vol. 07 (of 10)
       By Harmer, S. F. (Sidney Frederic), 1862-1950 [Editor]; Boulenger, George Albert, 1858-1937; Bridge, T. W. (Thomas William), 1848-1909; Herdman, W. A. (William Abbott), Sir, 1858-1924; Shipley, A. E. (Arthur Everett), Sir, 1861-1927 [Editor]
 (DIR) The Cambridge natural history, Vol. 08 (of 10)
       By Harmer, S. F. (Sidney Frederic), 1862-1950 [Editor]; Gadow, Hans, 1855-1928; Shipley, A. E. (Arthur Everett), Sir, 1861-1927 [Editor]
 (DIR) The Cambridge natural history, Vol. 09 (of 10)
       By Harmer, S. F. (Sidney Frederic), 1862-1950 [Editor]; Evans, A. H. (Arthur Humble), 1855-1943; Shipley, A. E. (Arthur Everett), Sir, 1861-1927 [Editor]
 (DIR) The Cambridge natural history, Vol. 10 (of 10)
       By Harmer, S. F. (Sidney Frederic), 1862-1950 [Editor]; Beddard, Frank E. (Frank Evers), 1858-1925; Shipley, A. E. (Arthur Everett), Sir, 1861-1927 [Editor]
 (DIR) The Canadian Entomologist, Vol. XII., No. 2, February 1880
       By Various; Saunders, William, 1836-1914 [Editor]
 (DIR) The Chain of Life in Geological Time A Sketch of the Origin and Succe
       By Dawson, John William, Sir, 1820-1899
 (DIR) The Chautauquan, Vol. 04, October 1883
       By Chautauqua Literary and Scientific Circle; Chautauqua Institution; Flood, Theodore L., 1842- [Editor]
 (DIR) The Chautauquan, Vol. 05, April 1885
       By Chautauqua Literary and Scientific Circle; Chautauqua Institution; Flood, Theodore L., 1842- [Editor]
 (DIR) The Chautauquan, Vol. 05, June 1885, No. 9
       By Chautauqua Literary and Scientific Circle; Chautauqua Institution; Flood, Theodore L., 1842- [Editor]
 (DIR) The Chemistry of Plant Life
       By Thatcher, Roscoe Wilfred, 1872-1933
 (DIR) The Child's Book of Nature Three parts in one
       By Hooker, Worthington, 1806-1867
 (DIR) The Christian Foundation, Or, Scientific and Religious Journal, Volum
       By Various; Walker, Aaron, 1826- [Editor]
 (DIR) The Coal Measures Amphibia of North America
       By Moodie, Roy Lee, 1880-1934
 (DIR) The Coming of Evolution: The Story of a Great Revolution in Science
       By Judd, John W. (John Wesley), 1840-1916
 (DIR) The Common Spiders of the United States
       By Emerton, J. H. (James Henry), 1847-1930
 (DIR) The Conchologist's First Book A System of Testaceous Malacology, Arr
       By Poe, Edgar Allan, 1809-1849; Brown, Thomas, 1785-1862
 (DIR) The Conditions of Existence as Affecting the Perpetuation of Living B
       By Huxley, Thomas Henry, 1825-1895
 (DIR) The Courtship of Animals
       By Pycraft, W. P. (William Plane), 1868-1942
 (DIR) The Crayfish: An Introduction to the Study of Zoology.
       By Huxley, Thomas Henry, 1825-1895
 (DIR) The Cubomedusæ
       By Conant, Franklin Story, 1870-1897
 (DIR) The Dancing Mouse: A Study in Animal Behavior
       By Yerkes, Robert Mearns, 1876-1956
 (DIR) The Darwinian Hypothesis
       By Huxley, Thomas Henry, 1825-1895
 (DIR) The Dawn of Reason; or, Mental Traits in the Lower Animals
       By Weir, James, Jr., 1856-1906
 (DIR) The Descent of Man and Selection in Relation to Sex, Vol. I
       By Darwin, Charles, 1809-1882
 (DIR) The Descent of Man and Selection in Relation to Sex, Vol. II (1st Edi
       By Darwin, Charles, 1809-1882
 (DIR) The Descent of Man, and Selection in Relation to Sex
       By Darwin, Charles, 1809-1882
 (DIR) The Deseado Formation of Patagonia
       By Loomis, Frederic Brewster, 1873-1937
 (DIR) The Destiny of Man, Viewed in the Light of His Origin
       By Fiske, John, 1842-1901
 (DIR) The Diatomaceæ of Philadelphia and Vicinity
       By Boyer, Charles S. (Charles Sumner), 1856-1928
 (DIR) The Different Forms of Flowers on Plants of the Same Species
       By Darwin, Charles, 1809-1882
 (DIR) The Dinosaur Quarry. Dinosaur National Monument, Colorado-Utah
       By Good, John M. (John Maxwell), 1924-; Stucker, Gilbert F.; White, Theodore Elmer, 1905-1977
 (DIR) The Doctrine of Evolution: Its Basis and Its Scope
       By Crampton, Henry Edward, 1875-1956
 (DIR) The Dog
       By Youatt, William, 1776-1847; Lewis, Elisha J. (Elisha Jarrett), 1820-1877 [Editor]
 (DIR) The Dolphin in History
       By Montagu, Ashley, 1905-1999; Lilly, John Cunningham, 1915-2001
 (DIR) The Domestic Cat
       By Stables, Gordon, 1840-1910
 (DIR) The Dwelling House
       By Poore, George Vivian, 1843-1904
 (DIR) The Edinburgh New Philosophical Journal, Vol. XLIX April-October 1850
       By Various; Jameson, Robert, 1774-1854 [Editor]
 (DIR) The Effects of Cross & Self-Fertilisation in the Vegetable Kingdom
       By Darwin, Charles, 1809-1882
 (DIR) The Elements of Agriculture A Book for Young Farmers, with Questions 
       By Waring, George E. (George Edwin), 1833-1898
 (DIR) The Elements of Botany, For Beginners and For Schools
       By Gray, Asa, 1810-1888
 (DIR) The English moths and butterflies
       By Wilkes, Benjamin, -1749
 (DIR) The Essentials of Illustration A Practical Guide to the Reproduction
       By Hill, Thomas George, 1876-1954
 (DIR) The Evolution Theory, Vol. 1 of 2
       By Weismann, August, 1834-1914; Thomson, J. Arthur (John Arthur), 1861-1933 [Translator]; Thomson, Margaret R. [Translator]
 (DIR) The Evolution Theory, Vol. 2 of 2
       By Weismann, August, 1834-1914; Thomson, J. Arthur (John Arthur), 1861-1933 [Translator]; Thomson, Margaret R. [Translator]
 (DIR) The Evolution of Man
       By Haeckel, Ernst, 1834-1919
 (DIR) The Evolution of Man Scientifically Disproved in 50 Arguments
       By Williams, William A. (William Asbury), 1854-1938
 (DIR) The Evolution of Man — Volume 1
       By Haeckel, Ernst, 1834-1919; McCabe, Joseph, 1867-1955 [Translator]
 (DIR) The Evolution of Man — Volume 2
       By Haeckel, Ernst, 1834-1919; McCabe, Joseph, 1867-1955 [Translator]
 (DIR) The Evolution of Marriage and of the Family
       By Letourneau, Ch. (Charles), 1831-1902
 (DIR) The Evolutionist at Large
       By Allen, Grant, 1848-1899
 (DIR) The Expression of the Emotions in Man and Animals
       By Darwin, Charles, 1809-1882
 (DIR) The Factors of Organic Evolution
       By Spencer, Herbert, 1820-1903
 (DIR) The Fairy-Land of Science
       By Buckley, Arabella B. (Arabella Burton), 1840-1929
 (DIR) The Fantastic Clan: The Cactus Family
       By Thornber, J. J. (John James), 1872-1962; Bonker, Frances, 1891-1959
 (DIR) The Farmer's Veterinarian: A Practical Treatise on the Diseases of Fa
       By Burkett, Charles William, 1873-1962
 (DIR) The Fern Bulletin, October 1903 A Quarterly Devoted to Ferns
       By Various; Clute, Willard Nelson, 1869-1950 [Editor]
 (DIR) The Fishing Industry
       By Gibbs, William E. (William Edward)
 (DIR) The Flea
       By Russell, Harold, 1868-
 (DIR) The Florist and Horticultural Journal, Vol. II. No. 7, July, 1853 A 
       By Various; Hanson, H. C. [Editor]
 (DIR) The Foot-prints of the Creator
       By Miller, Hugh, 1802-1856; Agassiz, Louis, 1807-1873 [Contributor]
 (DIR) The Forest Habitat of the University of Kansas Natural History Reserv
       By Fitch, Henry S. (Henry Sheldon), 1909-2009; McGregor, Ronald L.
 (DIR) The Forests of Mount Rainier National Park
       By Allen, G. F. (Grenville F.), 1865-1924; United States. Department of the Interior [Other]; United States. Forest Service [Other]
 (DIR) The Formation of Vegetable Mould Through the Action of Worms With Ob
       By Darwin, Charles, 1809-1882
 (DIR) The Foundations of the Origin of Species Two Essays written in 1842 a
       By Darwin, Charles, 1809-1882; Darwin, Francis, Sir, 1848-1925 [Editor]
 (DIR) The Fundamentals of Bacteriology
       By Morrey, Charles Bradfield, 1869-
 (DIR) The Genera of Phyllomedusine Frogs (Anura: Hylidae)
       By Duellman, William Edward, 1930-2022
 (DIR) The Genetic Effects of Radiation
       By Asimov, Isaac, 1920-1992; Dobzhansky, Theodosius, 1900-1975
 (DIR) The Genus Pinus
       By Shaw, George Russell, 1848-1937; Shaw, George Russell, 1848-1937 [Illustrator]
 (DIR) The Geographical Distribution of Animals, Volume 1 With a study of t
       By Wallace, Alfred Russel, 1823-1913
 (DIR) The Geographical Distribution of Animals, Volume 2 With a study of t
       By Wallace, Alfred Russel, 1823-1913
 (DIR) The Geological History of Plants
       By Dawson, John William, Sir, 1820-1899
 (DIR) The Glands Regulating Personality A Study of the Glands of Internal 
       By Berman, Louis, 1893-1946
 (DIR) The Glow-Worm and Other Beetles
       By Fabre, Jean-Henri, 1823-1915; Teixeira de Mattos, Alexander, 1865-1921 [Translator]
 (DIR) The Gospel of Evolution From "The Atheistic Platform", Twelve Lectur
       By Aveling, Edward B., 1849-1898
 (DIR) The Hand Phrenologically Considered Being a Glimpse at the Relation o
       By Anonymous
 (DIR) The Harvest of the Sea A contribution to the natural and economic hi
       By Bertram, James Glass, 1824-1892
 (DIR) The History of Creation, Vol. 1 (of 2) Or the Development of the Ear
       By Haeckel, Ernst, 1834-1919; Lankester, E. Ray (Edwin Ray), Sir, 1847-1929 [Editor]; Schmitz, L. Dora [Translator]
 (DIR) The History of Creation, Vol. 2 (of 2) Or the Development of the Ear
       By Haeckel, Ernst, 1834-1919; Lankester, E. Ray (Edwin Ray), Sir, 1847-1929 [Editor]; Schmitz, L. Dora [Translator]
 (DIR) The History of Esculent Fish
       By North, Roger, 1651-1734; Albin, Eleazar, active 1713-1759 [Illustrator]; Albin, Elizabeth [Illustrator]
 (DIR) The History of Insects
       By Unknown
 (DIR) The History of the European Fauna
       By Scharff, R. F. (Robert Francis), 1858-1934
 (DIR) The Homing Pigeon
       By United States. Army. Signal Corps; United States. War Department
 (DIR) The Honey-Bee: Its Natural History, Physiology and Management
       By Bevan, Edward, 1770-1860
 (DIR) The House Fly and How to Suppress It
       By Howard, L. O. (Leland Ossian), 1857-1950; Bishopp, F. C. (Fred Corry), 1884-1970
 (DIR) The Human Side of Animals
       By Dixon, Royal, 1885-1962
 (DIR) The Hunterian lectures on colour-vision and colour-blindness
       By Edridge-Green, F. W. (Frederick William), 1863-1953
 (DIR) The Hunting Wasps
       By Fabre, Jean-Henri, 1823-1915; Teixeira de Mattos, Alexander, 1865-1921 [Translator]
 (DIR) The Illustrated Self-Instructor in Phrenology and Physiology
       By Fowler, O. S. (Orson Squire), 1809-1887; Fowler, L. N. (Lorenzo Niles), 1811-1896
 (DIR) The Industries of Animals
       By Houssay, Frédéric, 1860-1920
 (DIR) The Insect
       By Michelet, Jules, 1798-1874; Giacomelli, Hector, 1822-1904 [Illustrator]
 (DIR) The Insect World Being a Popular Account of the Orders of Insects; T
       By Figuier, Louis, 1819-1894; Duncan, P. Martin (Peter Martin), 1821-1891 [Editor]
 (DIR) The Interpreters of Genesis and the Interpreters of Nature Essay #4 
       By Huxley, Thomas Henry, 1825-1895
 (DIR) The Italian Alp-bee; or, The gold mine of husbandry short and practi
       By Hermann, H. C. (Heinrich C.)
 (DIR) The Journal of a Disappointed Man
       By Barbellion, W. N. P., 1889-1919; Wells, H. G. (Herbert George), 1866-1946 [Author of introduction, etc.]
 (DIR) The Kansas University Quarterly, Vol. I, No. 1 (1892)
       By Various; Kellogg, Vernon L. (Vernon Lyman), 1867-1937 [Editor]
 (DIR) The Kansas University Science Bulletin (Vol. I, No. 1)
       By Various
 (DIR) The Kansas University Science Bulletin, Vol. I, No. 2, February, 1902
       By Various
 (DIR) The Kansas University science bulletin, Vol. I, No. 8, September 1902
       By Various [Editor]
 (DIR) The Kingdom of Man
       By Lankester, E. Ray (Edwin Ray), Sir, 1847-1929
 (DIR) The Last Link: Our Present Knowledge of the Descent of Man
       By Haeckel, Ernst, 1834-1919; Gadow, Hans, 1855-1928 [Commentator]
 (DIR) The Life and Letters of George John Romanes, M.A., LL.D., F.R.S.
       By Romanes, George John, 1848-1894; Romanes, Ethel Duncan
 (DIR) The Life and Love of the Insect
       By Fabre, Jean-Henri, 1823-1915; Teixeira de Mattos, Alexander, 1865-1921 [Translator]
 (DIR) The Life of Crustacea
       By Calman, W. T. (William Thomas), 1871-1952
 (DIR) The Life of an Insect being a history of the changes of insects from
       By Society for Promoting Christian Knowledge (Great Britain). General Literature Committee [Other]
 (DIR) The Life of the Bee
       By Maeterlinck, Maurice, 1862-1949; Sutro, Alfred, 1863-1933 [Translator]
 (DIR) The Life of the Caterpillar
       By Fabre, Jean-Henri, 1823-1915; Teixeira de Mattos, Alexander, 1865-1921 [Translator]
 (DIR) The Life of the Fly; With Which are Interspersed Some Chapters of Aut
       By Fabre, Jean-Henri, 1823-1915; Teixeira de Mattos, Alexander, 1865-1921 [Translator]
 (DIR) The Life of the Grasshopper
       By Fabre, Jean-Henri, 1823-1915; Teixeira de Mattos, Alexander, 1865-1921 [Translator]
 (DIR) The Life of the Scorpion
       By Fabre, Jean-Henri, 1823-1915; Miall, Bernard, 1876-1953 [Translator]; Teixeira de Mattos, Alexander, 1865-1921 [Translator]
 (DIR) The Life of the Spider
       By Fabre, Jean-Henri, 1823-1915; Teixeira de Mattos, Alexander, 1865-1921 [Translator]
 (DIR) The Life of the Weevil
       By Fabre, Jean-Henri, 1823-1915; Teixeira de Mattos, Alexander, 1865-1921
 (DIR) The Life-Story of Insects
       By Carpenter, George H. (George Herbert), 1865-1939
 (DIR) The Lights of the Church and the Light of Science Essay #6 from "Sci
       By Huxley, Thomas Henry, 1825-1895
 (DIR) The Lives of Celebrated Travellers, Vol. 2 (of 3)
       By St. John, James Augustus, 1795-1875
 (DIR) The Lobster Fishery of Maine Bulletin of the United States Fish Comm
       By Cobb, John N. (John Nathan), 1868-1930
 (DIR) The Making of Species
       By Dewar, Douglas, 1875-1957; Finn, Frank, 1868-1932
 (DIR) The Malay Archipelago, Volume 1 The Land of the Orang-utan and the B
       By Wallace, Alfred Russel, 1823-1913
 (DIR) The Mammals of Warren Woods, Berrien County, Michigan Occasional Pape
       By Dice, Lee R. (Lee Raymond), 1887-1977
 (DIR) The Mammals of Washtenaw County, Michigan Occasional Papers of the Mu
       By Wood, Norman Asa, 1857-
 (DIR) The Manual of the Botany of the Northern United States Including the
       By Gray, Asa, 1810-1888
 (DIR) The Mason-Bees
       By Fabre, Jean-Henri, 1823-1915; Teixeira de Mattos, Alexander, 1865-1921 [Translator]
 (DIR) The Mason-Wasps
       By Fabre, Jean-Henri, 1823-1915; Teixeira de Mattos, Alexander, 1865-1921 [Translator]
 (DIR) The Meaning of Evolution
       By Schmucker, Samuel Christian, 1860-
 (DIR) The Meaning of Infancy
       By Fiske, John, 1842-1901
 (DIR) The Mechanism of Life
       By Leduc, Stéphane, 1853-1939; Butcher, William Deane, 1846-1919 [Translator]
 (DIR) The Medicinal Plants of the Philippines
       By Pardo de Tavera, T. H. (Trinidad Hermenegildo), 1857-1925; Thomas, Jerome Beers, 1867- [Translator]
 (DIR) The Mental Life of Monkeys and Apes: A Study of Ideational Behavior
       By Yerkes, Robert Mearns, 1876-1956
 (DIR) The Method by Which the Causes of the Present and Past Conditions of 
       By Huxley, Thomas Henry, 1825-1895
 (DIR) The Methods and Scope of Genetics An inaugural lecture delivered 23 O
       By Bateson, William, 1861-1926
 (DIR) The Microscope
       By Ross, Andrew
 (DIR) The Microscope. Its History, Construction, and Application 15th ed. 
       By Hogg, Jabez, 1817-1899
 (DIR) The Migration of Birds
       By Coward, T. A. (Thomas Alfred), 1867-1933
 (DIR) The Migration of North American Birds (1935)
       By Lincoln, Frederick Charles, 1892-1960
 (DIR) The Minds and Manners of Wild Animals: A Book of Personal Observation
       By Hornaday, William T. (William Temple), 1854-1937
 (DIR) The Minor Horrors of War
       By Shipley, A. E. (Arthur Everett), Sir, 1861-1927
 (DIR) The Monist, Vol. 1, 1890-1891
       By Various; Carus, Paul, 1852-1919 [Editor]; Hegeler, Edward C, 1835-1910 [Editor]
 (DIR) The Moths of the British Isles, First Series Comprising the Families
       By South, Richard
 (DIR) The Moths of the British Isles, Second Series Comprising the Familie
       By South, Richard
 (DIR) The Movements and Habits of Climbing Plants
       By Darwin, Charles, 1809-1882
 (DIR) The Myxomycetes of the Miami Valley, Ohio
       By Morgan, A. P. (Andrew Price), 1836-1906
 (DIR) The Natural History of Cage Birds Their Management, Habits, Food, Di
       By Bechstein, Johann Matthäus, 1757-1822
 (DIR) The Natural History of Chocolate Being a Distinct and Particular Acco
       By Quélus, D.; Brookes, R. (Richard), active 1721-1763 [Translator]
 (DIR) The Natural History of Pliny, Volume 3 (of 6)
       By Pliny, the Elder, 24?-79; Bostock, John, 1773-1846 [Translator]; Riley, Henry T. (Henry Thomas), 1816-1878 [Translator]
 (DIR) The Natural History of Pliny, Volume 5 (of 6)
       By Pliny, the Elder, 24?-79; Bostock, John, 1773-1846 [Translator]; Riley, Henry T. (Henry Thomas), 1816-1878 [Translator]
 (DIR) The Natural History of the Tea-Tree, with Observations on the Medical
       By Lettsom, John Coakley, 1744-1815
 (DIR) The Natural History of the Varieties of Man
       By Latham, R. G. (Robert Gordon), 1812-1888
 (DIR) The Natural Philosophy of Love
       By Gourmont, Remy de, 1858-1915; Pound, Ezra, 1885-1972 [Translator]
 (DIR) The Naturalist in Nicaragua
       By Belt, Thomas, 1832-1878
 (DIR) The Naturalist on the River Amazons
       By Bates, Henry Walter, 1825-1892
 (DIR) The Naturalist's Repository, Volume 1 (of 5) or Monthly Miscellany of
       By Donovan, E. (Edward), 1768-1837
 (DIR) The Nature of Animal Light
       By Harvey, E. Newton (Edmund Newton), 1887-1959
 (DIR) The Nautilus. Vol. XXXI, No. 2, October 1917 A Quarterly Journal Devo
       By Various; Johnson, Charles Willison, 1863-1932 [Editor]; Pilsbry, Henry Augustus, 1862-1957 [Editor]
 (DIR) The Nests and Eggs of Indian Birds, Volume 1
       By Hume, Allan Octavian, 1829-1912; Oates, Eugene William, 1845-1911 [Editor]
 (DIR) The North American Slime-Moulds A Descriptive List of All Species of 
       By Macbride, Thomas H. (Thomas Huston), 1848-1934
 (DIR) The Notebooks of Leonardo Da Vinci — Complete
       By Leonardo, da Vinci, 1452-1519; Richter, Jean Paul, 1847-1937 [Translator]
 (DIR) The Nursery-Book: A Complete Guide to the Multiplication and Pollinat
       By Bailey, L. H. (Liberty Hyde), 1858-1954
 (DIR) The O. S. U. Naturalist, Vol. 1, No. 1, November, 1900
       By Ohio State University. Biological Club
 (DIR) The O. S. U. Naturalist, Vol. 1, No. 2, December, 1900
       By Ohio State University. Biological Club
 (DIR) The Ocean World: Being a Description of the Sea and Its Living Inhabi
       By Figuier, Louis, 1819-1894; Groom Napier, Charles Ottley, 1839- [Contributor]
 (DIR) The Ohio Journal of Science, Vol. XVI, No. 1, November 1915
       By Various
 (DIR) The Ohio Naturalist, Vol. I, No. 7, May, 1901
       By Ohio State University. Biological Club
 (DIR) The Ohio Naturalist, Vol. II, No. 1, November, 1901
       By Ohio State University. Biological Club
 (DIR) The Ohio Naturalist, vol. II, no. 2, December, 1901
       By Ohio State University. Biological Club
 (DIR) The Ohio naturalist, Vol. 1, No. 3, January, 1901
       By Ohio State University. Biological Club
 (DIR) The Ohio naturalist, Vol. 1, No. 4, February 1901
       By Ohio State University. Biological Club
 (DIR) The Ohio naturalist, Vol. 1, No. 8, June 1901
       By Ohio State University. Biological Club
 (DIR) The Orchid Album, Volume 3 Comprising Coloured Figures and Descripti
       By Moore, Thomas, 1821-1887; Warner, Robert, 1814-1896 [Editor]; Williams, Benjamin Samuel, 1822-1890 [Editor]; Fitch, J. N. (John Nugent), 1843-1927 [Illustrator]
 (DIR) The Organism as a Whole, from a Physicochemical Viewpoint
       By Loeb, Jacques, 1859-1924
 (DIR) The Origin of Man and of His Superstitions
       By Read, Carveth, 1848-1931
 (DIR) The Origin of Species From 'The Westminster Review', April 1860
       By Huxley, Thomas Henry, 1825-1895
 (DIR) The Origin of Species by Means of Natural Selection Or, the Preserva
       By Darwin, Charles, 1809-1882
 (DIR) The Origin of Vertebrates
       By Gaskell, Walter Holbrook, 1847-1914
 (DIR) The Ornithologist and Oölogist. Vol. VIII No. 3, March 1883 Birds: Th
       By Various; Wade, Joseph M. [Editor]
 (DIR) The Ornithosauria An elementary study of the bones of Pterodactyles 
       By Seeley, H. G. (Harry Govier), 1839-1909
 (DIR) The Outline of Science, Vol. 1 (of 4) A Plain Story Simply Told
       By Thomson, J. Arthur (John Arthur), 1861-1933
 (DIR) The Past Condition of Organic Nature Lecture II. (of VI.), "Lectures
       By Huxley, Thomas Henry, 1825-1895
 (DIR) The Pecan and its Culture
       By Hume, H. Harold (Hardrada Harold), 1875-1965
 (DIR) The Periodical Cicada, "the 17-year Locust"
       By United States. Department of Agriculture
 (DIR) The Perpetuation of Living Beings, Hereditary Transmission and Variat
       By Huxley, Thomas Henry, 1825-1895
 (DIR) The Philosophy Which Shows the Physiology of Mesmerism and Explains t
       By Pasley, T. H.
 (DIR) The Philosophy of Evolution Together With a Preliminary Essay on The
       By Carpenter, Stephen H. (Stephen Haskins), 1831-1878
 (DIR) The Philosophy of Health; Volume 1 (of 2) or, an exposition of the ph
       By Smith, Southwood, 1788-1861
 (DIR) The Philosophy of Health; Volume 2 (of 2) or, an exposition of the p
       By Smith, Southwood, 1788-1861
 (DIR) The Physical Basis of Mind Being the Second Series of Problems of Li
       By Lewes, George Henry, 1817-1878
 (DIR) The Pigmy Woodrat, Neotoma goldmani, Its Distribution and Systematic 
       By Rainey, Dennis G.; Baker, Rollin H. (Rollin Harold), 1916-2007
 (DIR) The Plants of Michigan Simple Keys for the Identification of the Nat
       By Gleason, Henry A. (Henry Allan), 1882-1975
 (DIR) The Pleistocene of North America and its vertebrated animals from th
       By Hay, Oliver Perry, 1846-1930
 (DIR) The Pocket Gophers (Genus Thomomys) of Utah University of Kansas Pub
       By Durrant, Stephen David, 1902-1975; Farner, Donald S. (Donald Sankey), 1915-1988 [Editor]; Hall, E. Raymond (Eugene Raymond), 1902-1986 [Editor]; Hoffmeister, Donald Frederick, 1916- [Editor]
 (DIR) The Popular Science Monthly, August, 1900 Vol. 57, May, 1900 to Octob
       By Various; Cattell, James McKeen, 1860-1944 [Editor]
 (DIR) The Popular Science Monthly, July, 1900 Vol. 57, May, 1900 to October
       By Various; Cattell, James McKeen, 1860-1944 [Editor]
 (DIR) The Popular Science Monthly, June, 1900 Vol. 57, May, 1900 to October
       By Various; Cattell, James McKeen, 1860-1944 [Editor]
 (DIR) The Popular Science Monthly, October, 1900 Vol. 57, May, 1900 to Octo
       By Various; Cattell, James McKeen, 1860-1944 [Editor]
 (DIR) The Popular Science Monthly, September, 1900 Vol. 57, May, 1900 to Oc
       By Various; Cattell, James McKeen, 1860-1944 [Editor]
 (DIR) The Postnatal Development of Two Broods of Great Horned Owls (Bubo vi
       By Hoffmeister, Donald Frederick, 1916-; Setzer, Henry W.
 (DIR) The Power of Movement in Plants
       By Darwin, Charles, 1809-1882; Darwin, Francis, Sir, 1848-1925
 (DIR) The Preparation of Bees for Outdoor Wintering
       By Phillips, Everett Franklin, 1878-1951; Demuth, Geo. S. (George S.), 1871-1934
 (DIR) The Present Condition of Organic Nature Lecture I. (of VI.), "Lectur
       By Huxley, Thomas Henry, 1825-1895
 (DIR) The Present Method of Inoculating for the Small-Pox To which are add
       By Dimsdale, Thomas, 1712-1800
 (DIR) The Principal Species of Wood: Their Characteristic Properties First 
       By Snow, Charles H. (Charles Henry), 1863-1957
 (DIR) The Principles of Biology, Volume 1 (of 2)
       By Spencer, Herbert, 1820-1903
 (DIR) The Principles of Biology, Volume 2 (of 2)
       By Spencer, Herbert, 1820-1903
 (DIR) The Principles of Breeding or, Glimpses at the Physiological Laws in
       By Goodale, S. L. (Stephen Lincoln), 1815-1897
 (DIR) The Progress of the Century
       By Wallace, Alfred Russel, 1823-1913 [Contributor]; Allen, Alexander V. G. (Alexander Viets Griswold), 1841-1908 [Contributor]; Caird, Edward, 1835-1908 [Contributor]; Clarke, Thomas Curtis, 1827-1901 [Contributor]; Dilke, Charles Wentworth, Sir, 1843-1911 [Contributor]; Gibbons, James, 1834-1921 [Contributor]; Gottheil, Richard J. H. (Richard James Horatio), 1862-1936 [Contributor]; Keen, William W. (William Williams), 1837-1932 [Contributor]; Lang, Andrew, 1844-1912 [Contributor]; Lockyer, Norman, Sir, 1836-1920 [Contributor]; Mahan, A. T. (Alfred Thayer), 1840-1914 [Contributor]; Mendenhall, Thomas C. (Thomas Corwin), 1841-1924 [Contributor]; Osler, William, Sir, 1849-1919 [Contributor]; Petrie, W. M. Flinders (William Matthew Flinders), 1853-1942 [Contributor]; Ramsay, William, 1852-1916 [Contributor]; Smith, Goldwin, 1823-1910 [Contributor]; Thomson, Elihu, 1853-1937 [Contributor]
 (DIR) The Prolongation of Life: Optimistic Studies
       By Metchnikoff, Elie, 1845-1916; Mitchell, P. Chalmers (Peter Chalmers), Sir, 1864-1945 [Editor]
 (DIR) The Pros and Cons of Vivisection
       By Richet, Charles, 1850-1935; Halliburton, W. D. (William Dobinson), 1860-1931 [Commentator]
 (DIR) The Protection of Fresh-Water Mussels
       By Coker, R. E. (Robert Ervin), 1876-1967
 (DIR) The Recent Mammals of Tamaulipas, México
       By Alvarez, Ticul, 1935-2001
 (DIR) The Riddle of the Universe at the close of the nineteenth century
       By Haeckel, Ernst, 1834-1919; McCabe, Joseph, 1867-1955 [Translator]
 (DIR) The Rise and Progress of Palaeontology Essay #2 from "Science and He
       By Huxley, Thomas Henry, 1825-1895
 (DIR) The Rocky Mountain Goat
       By Grant, Madison, 1865-1937
 (DIR) The Romance of Plant Life Interesting Descriptions of the Strange and
       By Elliot, G. F. Scott (George Francis Scott), 1862-1934
 (DIR) The Sacred Beetle, and Others
       By Fabre, Jean-Henri, 1823-1915; Teixeira de Mattos, Alexander, 1865-1921 [Translator]
 (DIR) The Salmon Fishery of Penobscot Bay and River in 1895-96
       By Smith, Hugh M. (Hugh McCormick), 1865-1941
 (DIR) The Science and Philosophy of the Organism
       By Driesch, Hans, 1867-1941
 (DIR) The Science of Animal Locomotion (Zoopraxography) An Electro-Photogr
       By Muybridge, Eadweard, 1830-1904
 (DIR) The Science of Fingerprints: Classification and Uses
       By United States. Federal Bureau of Investigation; Hoover, J. Edgar (John Edgar), 1895-1972 [Contributor]
 (DIR) The Scientific Evidences of Organic Evolution
       By Romanes, George John, 1848-1894
 (DIR) The Sea Shore
       By Furneaux, William S.; Lillie, R. [Illustrator]
 (DIR) The Sea and Its Living Wonders A Popular Account of the Marvels of t
       By Hartwig, G. (Georg), 1813-1880
 (DIR) The Sea-beach at Ebb-tide A Guide to the Study of the Seaweeds and t
       By Arnold, Augusta Foote, 1844-1903
 (DIR) The Sense of Taste
       By Hollingworth, Harry L. (Harry Levi), 1880-1956; Poffenberger, Albert T. (Albert Theodore), 1885-1977; Dearborn, George V. N., 1869-1938 [Editor]
 (DIR) The Snakes of Europe
       By Boulenger, George Albert, 1858-1937
 (DIR) The Social Direction of Evolution: An Outline of the Science of Eugen
       By Kellicott, William E. (William Erskine), 1878-1919
 (DIR) The Speech of Monkeys
       By Garner, R. L. (Richard Lynch), 1848-1920
 (DIR) The Stock-Feeder's Manual the chemistry of food in relation to the b
       By Cameron, Charles Alexander, Sir, 1830-1921
 (DIR) The Story of Creation as Told By Theology and By Science
       By Ackland, T. S. (Thomas Suter), 1817-1892
 (DIR) The Story of Evolution
       By McCabe, Joseph, 1867-1955
 (DIR) The Story of Germ Life
       By Conn, H. W. (Herbert William), 1859-1917
 (DIR) The Story of Milk
       By Frederiksen, Johan Ditlev, 1848-
 (DIR) The Story of the Living Machine A Review of the Conclusions of Modern
       By Conn, H. W. (Herbert William), 1859-1917
 (DIR) The Story-book of Science
       By Fabre, Jean-Henri, 1823-1915; Bicknell, Florence Constable, 1858-1941 [Translator]
 (DIR) The Structure and Habits of Spiders
       By Emerton, J. H. (James Henry), 1847-1930
 (DIR) The Structure and Life-history of the Cockroach (Periplaneta oriental
       By Miall, L. C. (Louis Compton), 1842-1921; Denny, Alfred, 1847-1960
 (DIR) The Study of Plant Life
       By Stopes, Marie Carmichael, 1880-1958
 (DIR) The Subspecies of the Mexican Red-Bellied Squirrel, Sciurus aureogast
       By Kelson, Keith R.
 (DIR) The Subspecies of the Mountain Chickadee
       By Grinnell, Joseph, 1877-1939
 (DIR) The Subspecific Status of Two Central American Sloths
       By Hall, E. Raymond (Eugene Raymond), 1902-1986; Kelson, Keith R.
 (DIR) The Systematic Status of Eumeces pluvialis Cope
       By Smith, Hobart M. (Hobart Muir), 1912-2013
 (DIR) The Systematics of the Frogs of the Hyla Rubra Group in Middle Americ
       By León, Juan R.
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       By Smith, Hobart M. (Hobart Muir), 1912-2013
 (DIR) The Taleef Shereef; Or, Indian Materia Medica
       By Playfair, George [Translator]
 (DIR) The Theories of Darwin and Their Relation to Philosophy, Religion, an
       By Schmid, Rudolf, 1828-1907; Zimmermann, G. A. (Gustav Adolf), 1850-1903 [Translator]
 (DIR) The Tower Menagerie
       By Bennett, Edward Turner, 1797-1836; Harvey, William, 1796-1866 [Illustrator]
 (DIR) The Toxicity of Caffein: An experimental study on different species o
       By Salant, William; Rieger, J. B. (John Benjamin), 1886-
 (DIR) The Tropical World Aspects of man and nature in the equatorial region
       By Hartwig, G. (Georg), 1813-1880
 (DIR) The Underworld of Oregon Caves National Monument
       By Contor, Roger J., 1930-
 (DIR) The Universal Kinship
       By Moore, J. Howard (John Howard), 1862-1916
 (DIR) The Variation of Animals and Plants Under Domestication, Vol. I.
       By Darwin, Charles, 1809-1882
 (DIR) The Variation of Animals and Plants Under Domestication, Volume II (o
       By Darwin, Charles, 1809-1882
 (DIR) The Variation of Animals and Plants under Domestication
       By Darwin, Charles, 1809-1882
 (DIR) The Variation of Animals and Plants under Domestication — Volume 1
       By Darwin, Charles, 1809-1882
 (DIR) The Variation of Animals and Plants under Domestication — Volume 2
       By Darwin, Charles, 1809-1882
 (DIR) The Vertebrate Skeleton
       By Reynolds, Sidney H. (Sidney Hugh), 1867-
 (DIR) The Virtue and Use of Coffee With Regard to the Plague and Other Infe
       By Bradley, Richard, 1688-1732
 (DIR) The Vitamine Manual
       By Eddy, Walter Hollis, 1877-1959
 (DIR) The Vivisectors' Directory Being a list of the licensed vivisectors 
       By Bryan, Benjamin, 1840- [Editor]; Cobbe, Frances Power, 1822-1904 [Author of introduction, etc.]
 (DIR) The Voyage of the Beagle
       By Darwin, Charles, 1809-1882
 (DIR) The Whence and the Whither of Man A Brief History of His Origin and 
       By Tyler, John M. (John Mason), 1851-1929
 (DIR) The Wild Elephant and the Method of Capturing and Taming it in Ceylon
       By Tennent, James Emerson, Sir, 1804-1869
 (DIR) The Wonders of Instinct: Chapters in the Psychology of Insects
       By Fabre, Jean-Henri, 1823-1915; Miall, Bernard, 1876-1953 [Translator]; Teixeira de Mattos, Alexander, 1865-1921 [Translator]
 (DIR) The Wonders of Life: A Popular Study of Biological Philosophy
       By Haeckel, Ernst, 1834-1919; McCabe, Joseph, 1867-1955 [Translator]
 (DIR) The Works of William Harvey M.D. Translated from the Latin with a lif
       By Harvey, William, 1578-1657; Willis, Robert, 1799-1878 [Translator]
 (DIR) The World's Greatest Books — Volume 15 — Science
       By Mee, Arthur, 1875-1943 [Editor]; Hammerton, J. A. (John Alexander), 1871-1949 [Editor]
 (DIR) The alligator and its allies
       By Reese, A. M. (Albert Moore), 1872-1965
 (DIR) The anatomy of the domestic fowl
       By Kaupp, B. F. (Benjamin Franklyn), 1874-1954
 (DIR) The apiary; or, bees, bee-hives, and bee culture [1865] Being a fami
       By Neighbor, Alfred
 (DIR) The apiary; or, bees, bee-hives, and bee culture [1866] Being a fami
       By Neighbor, Alfred
 (DIR) The apiary; or, bees, bee-hives, and bee culture [1878] being a fami
       By Neighbor, Alfred
 (DIR) The attitudes of animals in motion, illustrated with the zoopraxiscop
       By Muybridge, Eadweard, 1830-1904
 (DIR) The bedbug
       By United States. Public Health Service
 (DIR) The birds of Jamaica
       By Gosse, Philip Henry, 1810-1888; Hill, Richard, 1795-1872 [Contributor]
 (DIR) The book of antelopes, vol. 1 (of 4)
       By Sclater, Philip Lutley, 1829-1913; Thomas, Oldfield, 1858-1929
 (DIR) The book of antelopes, vol. 2 (of 4)
       By Sclater, Philip Lutley, 1829-1913; Thomas, Oldfield, 1858-1929
 (DIR) The book of antelopes, vol. 3 (of 4)
       By Sclater, Philip Lutley, 1829-1913; Thomas, Oldfield, 1858-1929
 (DIR) The book of antelopes, vol. 4 (of 4)
       By Sclater, Philip Lutley, 1829-1913; Thomas, Oldfield, 1858-1929
 (DIR) The book of wonders
       By Bodmer, Rudolph J. (Rudolph John), 1872-1952 [Editor]
 (DIR) The botanist's repository for new and rare plants; vol. 01 & 02 [of 1
       By Andrews, Henry Cranke, active 1799-1828
 (DIR) The botanist's repository for new and rare plants; vol. 03 & 04 [of 1
       By Andrews, Henry Cranke, active 1799-1828
 (DIR) The botanist's repository for new and rare plants; vol. 05 [of 10]
       By Andrews, Henry Cranke, active 1799-1828
 (DIR) The botanist's repository for new and rare plants; vol. 06 [of 10]
       By Andrews, Henry Cranke, active 1799-1828
 (DIR) The botanist's repository for new and rare plants; vol. 07 [of 10]
       By Andrews, Henry Cranke, active 1799-1828
 (DIR) The botanist's repository for new and rare plants; vol. 08 [of 10]
       By Andrews, Henry Cranke, active 1799-1828
 (DIR) The botanist's repository for new and rare plants; vol. 09 [of 10]
       By Andrews, Henry Cranke, active 1799-1828
 (DIR) The case against evolution
       By O'Toole, George Barry, 1886-1944
 (DIR) The cherries of New York
       By Hedrick, U. P., 1870-1951; Howe, G. H. (George Henry), 1888- [Contributor]; Taylor, O. M. (Orrin Morehouse), 1865-1932 [Contributor]; Tubergen, C. B. (Charles Burton), 1890- [Contributor]; Wellington, R. (Richard), 1884-1975 [Contributor]
 (DIR) The chocolate-plant (Theobroma cacao) and its products
       By Anonymous
 (DIR) The cretaceous birds of New Jersey
       By Olson, Storrs L., 1944-2021; Parris, David C.
 (DIR) The elements of bacteriological technique
       By Eyre, J. W. H. (John William Henry), 1869-1944
 (DIR) The ethics of Hercules
       By Givler, Robert Chenault, 1884-1975
 (DIR) The fauna of the deep sea
       By Hickson, Sydney J. (Sydney John), 1859-1940; Lubbock, John, Sir, 1834-1913 [Editor]
 (DIR) The flowering plants of Africa An analytical key to the genera of Af
       By Thonner, Franz, 1863-1928; Rendle, A. B. (Alfred Barton), 1865-1938 [Editor]; Fleischmann, Joseph [Illustrator]
 (DIR) The flowering plants of South Africa; vol. 2
       By Pole Evans, I. B. (Illtyd Buller), 1879-1968 [Editor]
 (DIR) The flowering plants of South Africa; vol. 3
       By Pole Evans, I. B. (Illtyd Buller), 1879-1968
 (DIR) The flowering plants of South Africa; vol. 4
       By Pole Evans, I. B. (Illtyd Buller), 1879-1968
 (DIR) The flowering plants of South Africa; vol. 5
       By Pole Evans, I. B. (Illtyd Buller), 1879-1968
 (DIR) The genetic and the operative evidence relating to secondary sexual c
       By Morgan, Thomas Hunt, 1866-1945
 (DIR) The giant sequoia
       By Ellsworth, Rodney Sydes, 1898-1981; Hoyt, H. S. (Herman Simeon), 1868-1961 [Photographer]; Pillsbury, Arthur C. (Arthur Clarence), 1870-1946 [Photographer]
 (DIR) The grapes of New York
       By Hedrick, U. P., 1870-1951; Booth, N. O. (Nathaniel Ogden), 1869-1919 [Contributor]; Dorsey, Maxwell Jay, 1880-1966 [Contributor]; Taylor, O. M. (Orrin Morehouse), 1865-1932 [Contributor]; Wellington, R. (Richard), 1884-1975 [Contributor]
 (DIR) The heart of Africa, Vol. 1 (of 2)
       By Schweinfurth, Georg August, 1836-1925; Reade, William Winwood, 1838-1875 [Author of introduction, etc.]; Frewer, Ellen E. (Ellen Elizabeth), 1848-1940 [Translator]
 (DIR) The heathery; or, A monograph of the genus Erica. vol. 1
       By Andrews, Henry Cranke, active 1799-1828
 (DIR) The heathery; or, A monograph of the genus Erica. vol. 2
       By Andrews, Henry Cranke, active 1799-1828
 (DIR) The heathery; or, A monograph of the genus Erica. vol. 3
       By Andrews, Henry Cranke, active 1799-1828
 (DIR) The heathery; or, A monograph of the genus Erica. vol. 4
       By Andrews, Henry Cranke, active 1799-1828
 (DIR) The heathery; or, A monograph of the genus Erica. vol. 5
       By Andrews, Henry Cranke, active 1799-1828
 (DIR) The heathery; or, A monograph of the genus Erica. vol. 6
       By Andrews, Henry Cranke, active 1799-1828
 (DIR) The history of a mouthful of bread
       By Macé, Jean, 1815-1894; Gatty, Alfred, Mrs., 1809-1873 [Translator]
 (DIR) The honey bee: a manual of instruction in apiculture
       By Benton, Frank, 1852-1919
 (DIR) The honey-bee: its nature, homes and products
       By Harris, William Hetherington, 1835-
 (DIR) The horse's mouth, showing the age by the teeth
       By Mayhew, Edward, 1813?-1868
 (DIR) The house we live in
       By Farnsworth, Vesta J. (Vesta Jane), 1855-1932
 (DIR) The human foot and the human hand
       By Humphry, George Murray, Sir, 1820-1896
 (DIR) The human species
       By Quatrefages, A. de (Armand de), 1810-1892
 (DIR) The illustrated story of evolution
       By Gauvin, Marshall J. (Marshall Jerome), 1881-1978
 (DIR) The ivory king
       By Holder, Charles Frederick, 1851-1915
 (DIR) The life of Jean Henri Fabre, the entomologist, 1823-1910
       By Fabre, Augustin, -1951; Miall, Bernard, 1876-1953 [Translator]
 (DIR) The life of Pasteur
       By Vallery-Radot, René, 1853-1933; Osler, William, Sir, 1849-1919 [Author of introduction, etc.]; Devonshire, R. L., Mrs., 1864-1949 [Translator]
 (DIR) The little book of British quadrupeds
       By May, W.
 (DIR) The micro-organisms of the soil
       By Russell, Edward J. (Edward John), 1872-1965; Rothamsted Experimental Station
 (DIR) The modes of origin of lowest organisms including a discussion of the
       By Bastian, H. Charlton, 1837-1915
 (DIR) The octopus
       By Lee, Henry, 1826-1888
 (DIR) The pathology of influenza
       By Winternitz, M. C. (Milton C.), 1885-1959; McNamara, Frank P., 1884-; Wason, Isabel M., 1890-
 (DIR) The pears of New York
       By Hedrick, U. P., 1870-1951; Francis, E. H. (Edward H.), 1862- [Contributor]; Howe, G. H. (George Henry), 1888- [Contributor]; Taylor, O. M. (Orrin Morehouse), 1865-1932 [Contributor]; Tukey, H. B. (Harold Bradford), 1896-1971 [Contributor]
 (DIR) The philosophy of biology
       By Johnstone, James, 1870-1932
 (DIR) The physiology of digestion considered with relation to the principle
       By Combe, Andrew, 1797-1847
 (DIR) The plums of New York
       By Hedrick, U. P., 1870-1951; Alderman, W. H. (William Horace), 1885-1985 [Contributor]; Dorsey, Maxwell Jay, 1880-1966 [Contributor]; Taylor, O. M. (Orrin Morehouse), 1865-1932 [Contributor]; Wellington, R. (Richard), 1884-1975 [Contributor]
 (DIR) The plurality of the human race
       By Pouchet, G. (Georges), 1833-1894; Beavan, Hugh J. C. [Translator]
 (DIR) The preparation & mounting of microscopic objects
       By Davies, Thomas, 1831?-1876
 (DIR) The puzzle of life and how it has been put together
       By Nicols, Arthur; Waddy, Frederick, 1848-1901 [Illustrator]
 (DIR) The reason why
       By Philp, Robert Kemp, 1819-1882
 (DIR) The romance of insect life
       By Selous, Edmund, 1857-1934; Moore-Park, Carton, 1877-1956 [Illustrator]; Speed, Lancelot, 1860-1931 [Illustrator]
 (DIR) The romance of natural history, second series
       By Gosse, Philip Henry, 1810-1888
 (DIR) The romance of the animal world
       By Selous, Edmund, 1857-1934; Dadd, Stephen T., 1858-1917 [Illustrator]; Speed, Lancelot, 1860-1931 [Illustrator]
 (DIR) The romance of the microscope
       By Ealand, C. A. (Charles Aubrey), 1877-1941
 (DIR) The run
       By Hay, John, 1915-2011; Grose, David, 1922-2016 [Illustrator]
 (DIR) The suppression of tuberculosis 
       By Behring, Emil von, 1854-1917; Bolduan, Charles, 1873-1950 [Translator]
 (DIR) The useful trees of northern Nigeria
       By Lely, Hugh Vandervaes, 1891-1947
 (DIR) The winners in life's race
       By Buckley, Arabella B. (Arabella Burton), 1840-1929
 (DIR) The works of Francis Maitland Balfour, Volume 1 (of 4)
       By Balfour, Francis M. (Francis Maitland), 1851-1882; Foster, M. (Michael), Sir, 1836-1907 [Editor]; Sedgwick, Adam, 1854-1913 [Editor]
 (DIR) The works of Francis Maitland Balfour, Volume 2 (of 4)
       By Balfour, Francis M. (Francis Maitland), 1851-1882; Foster, M. (Michael), Sir, 1836-1907 [Editor]; Sedgwick, Adam, 1854-1913 [Editor]
 (DIR) The works of Francis Maitland Balfour, Volume 3 (of 4)
       By Balfour, Francis M. (Francis Maitland), 1851-1882; Foster, M. (Michael), Sir, 1836-1907 [Editor]; Sedgwick, Adam, 1854-1913 [Editor]
 (DIR) The works of Francis Maitland Balfour, Volume 4 (of 4)
       By Balfour, Francis M. (Francis Maitland), 1851-1882; Foster, M. (Michael), Sir, 1836-1907 [Editor]; Sedgwick, Adam, 1854-1913 [Editor]
 (DIR) The zoology of the voyage of H.M.S. Beagle [vol. 1 of 5]
       By Owen, Richard, 1804-1892; Darwin, Charles, 1809-1882 [Editor]
 (DIR) The zoology of the voyage of H.M.S. Beagle [vol. 2 of 5]
       By Waterhouse, G. R. (George Robert), 1810-1888; Darwin, Charles, 1809-1882 [Editor]
 (DIR) The zoology of the voyage of H.M.S. Beagle [vol. 3 of 5]
       By Gould, John, 1804-1881; Eyton, T. C. (Thomas Campbell), 1809-1880 [Contributor]; Gray, George Robert, 1808-1872 [Contributor]; Darwin, Charles, 1809-1882 [Editor]; Gould, Elizabeth, 1804-1841 [Illustrator]
 (DIR) Theory of circulation by respiration
       By Willard, Emma, 1787-1870
 (DIR) Thomas Henry Huxley; A Sketch Of His Life And Work
       By Mitchell, P. Chalmers (Peter Chalmers), Sir, 1864-1945
 (DIR) Thoracic and Coracoid Arteries In Two Families of Birds, Columbidae a
       By Jenkinson, Marion Anne
 (DIR) Thoughts on General and Partial Inoculations Containing a translatio
       By Dimsdale, Thomas, 1712-1800
 (DIR) Thoughts on Religion
       By Romanes, George John, 1848-1894; Gore, Charles, 1853-1932 [Editor]
 (DIR) Three New Beavers from Utah
       By Durrant, Stephen David, 1902-1975; Crane, Harold S. (Harold Samuel), 1921-1966
 (DIR) Through Magic Glasses and Other Lectures A Sequel to The Fairyland of
       By Buckley, Arabella B. (Arabella Burton), 1840-1929
 (DIR) Through a Microscope Something of the Science, Together with many Cu
       By Wells, Samuel; Sargent, Frederick Leroy, 1863-1928; Treat, Mary, 1835-
 (DIR) Through a pocket lens
       By Scherren, Henry, 1842-1911
 (DIR) Time and Change
       By Burroughs, John, 1837-1921
 (DIR) Time and Life: Mr. Darwin's "Origin of Species"
       By Huxley, Thomas Henry, 1825-1895
 (DIR) Toadstools, mushrooms, fungi, edible and poisonous; one thousand Amer
       By McIlvaine, Charles, 1840-1909; Macadam, Robert K.
 (DIR) Tobacco; Its History, Varieties, Culture, Manufacture and Commerce
       By Billings, E. R.
 (DIR) Travels in Peru and India While Superintending the Collection of Chi
       By Markham, Clements R. (Clements Robert), Sir, 1830-1916
 (DIR) Travels into North America, Volume 2 (of 3)
       By Kalm, Pehr, 1716-1779; Forster, Johann Reinhold, 1729-1798 [Translator]
 (DIR) Travels into North America, Volume 3 (of 3)
       By Kalm, Pehr, 1716-1779; Forster, Johann Reinhold, 1729-1798 [Translator]
 (DIR) Travels on the Amazon
       By Wallace, Alfred Russel, 1823-1913
 (DIR) Treatise on the Anatomy and Physiology of the Mucous Membranes With I
       By Bichat, Xavier, 1771-1802; Houlton, Joseph, 1783-1855 [Translator]
 (DIR) Trees of Indiana First Revised Edition (Publication No. 13, Departmen
       By Deam, Charles Clemon, 1865-1953
 (DIR) Trees of the Northern United States Their Study, Description and Dete
       By Apgar, A. C. (Austin Craig), 1838-1908
 (DIR) Trees: A Woodland Notebook Containing Observations on Certain Britis
       By Maxwell, Herbert, Sir, 1845-1937
 (DIR) Two New Meadow Mice from Michoacán Mexico
       By Hall, E. Raymond (Eugene Raymond), 1902-1986
 (DIR) Two New Moles (Genus Scalopus) from Mexico and Texas
       By Baker, Rollin H. (Rollin Harold), 1916-2007
 (DIR) Two New Pelycosaurs from the Lower Permian of Oklahoma
       By Fox, Richard C.
 (DIR) Two New Pocket Gophers from Wyoming and Colorado
       By Hall, E. Raymond (Eugene Raymond), 1902-1986; Montague, H. Gordon
 (DIR) Type specimens of amphibians and reptiles in the Museum of Natural Hi
       By Duellman, William Edward, 1930-2022; Berg, Barbara
 (DIR) Uit de dierenwereld van het water Schetsen in woord en beeld van het
       By Snijders, A. J. C. (Anthony J. C.), 1844-
 (DIR) Unconscious Memory
       By Butler, Samuel, 1835-1902
 (DIR) Unsere Haustiere vom Standpunkte ihrer wilden Verwandten
       By Zell, Th. (Theodor), 1862-1924
 (DIR) Use of the Dead to the Living
       By Smith, Southwood, 1788-1861
 (DIR) Useful Knowledge: Volume 2. Vegetables Or, a familiar account of the
       By Bingley, William, 1774-1823
 (DIR) Useful Knowledge: Volume 3. Animals Or, a familiar account of the va
       By Bingley, William, 1774-1823
 (DIR) Variation in the Muscles and Nerves of the Leg in Two Genera of Grous
       By Holmes, E. Bruce
 (DIR) Vasárnapi Könyv. 1914. Első félév 15. füzet
       By Various; Árkay, Kálmán [Editor]
 (DIR) Vegetable Teratology An Account of the Principal Deviations from the 
       By Masters, Maxwell T. (Maxwell Tylden), 1833-1907
 (DIR) Venomous arthropod handbook
       By Biery, Terry L.
 (DIR) Venoms: Venomous Animals and Antivenomous Serum-therapeutics
       By Calmette, A. (Albert), 1863-1933; Austen, E. E. (Ernest Edward), 1867-1938 [Translator]
 (DIR) Versuche über Pflanzenhybriden
       By Mendel, Gregor, 1822-1884
 (DIR) Vertebrates from the Barrier Island of Tamaulipas, México
       By Selander, Robert K.; Johnston, Richard F.; Raun, Gerald G.; Wilks, B. J.
 (DIR) Vestiges of the Natural History of Creation
       By Chambers, Robert, 1802-1871
 (DIR) Vivisection
       By Leffingwell, Albert, 1845-1916
 (DIR) Von Sonnen und Sonnenstäubchen
       By Bölsche, Wilhelm, 1861-1939
 (DIR) Warum wir sterben
       By Lipschütz, Alejandro, 1883-1980
 (DIR) Was Man Created?
       By Mott, Henry A. (Henry Augustus), 1852-1896
 (DIR) Wasps, Social and Solitary
       By Peckham, George W. (George Williams), 1845-1914; Peckham, E. G. (Elizabeth Gifford), 1854-; Emerton, J. H. (James Henry), 1847-1930 [Illustrator]
 (DIR) Water Reptiles of the Past and Present
       By Williston, Samuel Wendell, 1851-1918
 (DIR) Wayside and woodland trees
       By Step, Edward, 1855-1931
 (DIR) Westafrikanische Kautschuk-Expedition
       By Schlechter, Rudolf, 1872-1925; Deutsche Kolonialgesellschaft. Kolonial-Wirtschaftliches Komitee
 (DIR) Whale Primer, with Special Attention to the California Gray Whale
       By Walker, Theodore J.
 (DIR) Whale hunting with gun and camera A naturalist's account of the mode
       By Andrews, Roy Chapman, 1884-1960
 (DIR) What is Darwinism?
       By Hodge, Charles, 1797-1878
 (DIR) Which Shall Live—Men or Animals?
       By Baynes, Ernest Harold, 1868-1925
 (DIR) Wild Animals of North America Intimate Studies of Big and Little Crea
       By Nelson, Edward William, 1855-1934; Grosvenor, Gilbert Hovey, 1875-1966 [Author of introduction, etc.]; Fuertes, Louis Agassiz, 1874-1927 [Illustrator]; Seton, Ernest Thompson, 1860-1946 [Illustrator]
 (DIR) Wild Flowers An Aid to Knowledge of Our Wild Flowers and Their Insect
       By Blanchan, Neltje, 1865-1918
 (DIR) William Harvey and the Discovery of the Circulation of the Blood
       By Huxley, Thomas Henry, 1825-1895
 (DIR) Wintering Bees in Cellars
       By Phillips, Everett Franklin, 1878-1951; Demuth, Geo. S. (George S.), 1871-1934
 (DIR) Within the Deep Cassell's "Eyes and No Eyes" Series, Book VIII.
       By Smith, R. Cadwallader
 (DIR) Woher die Kindlein kommen
       By Hoppeler, Hans, 1879-1945
 (DIR) Woman and Womanhood: A Search for Principles
       By Saleeby, C. W. (Caleb Williams), 1878-1940
 (DIR) Woman in Science With an Introductory Chapter on Woman's Long Struggl
       By Zahm, J. A. (John Augustine), 1851-1921
 (DIR) Wood and Forest
       By Noyes, William, 1862-1928
 (DIR) Yeast
       By Huxley, Thomas Henry, 1825-1895
 (DIR) Zakflora voor Suriname [Deel I] Bulletin van het Koloniaal Museum te 
       By Pulle, A. A. (August Adriaan), 1878-1955
 (DIR) Zeugnisse für die Stellung des Menschen in der Natur
       By Huxley, Thomas Henry, 1825-1895; Carus, Julius Victor, 1823-1903 [Translator]
 (DIR) Zoological Illustrations, Second Series, Volume 1 or, Original Figur
       By Swainson, William, 1789-1855
 (DIR) Zoological Illustrations, Second Series, Volume 2 or, Original Figur
       By Swainson, William, 1789-1855
 (DIR) Zoological Illustrations, Second Series, Volume 3 or, Original Figur
       By Swainson, William, 1789-1855
 (DIR) Zoological Illustrations, Volume 1 or, Original Figures and Descript
       By Swainson, William, 1789-1855
 (DIR) Zoological Illustrations, Volume 2 or, Original Figures and Descript
       By Swainson, William, 1789-1855
 (DIR) Zoological Illustrations, Volume 3 or, Original Figures and Descript
       By Swainson, William, 1789-1855
 (DIR) Zoonomia; Or, the Laws of Organic Life, Vol. I
       By Darwin, Erasmus, 1731-1802
 (DIR) Zoölogische Philosophie Of beschouwingen over de Natuurlijke Historie
       By Lamarck, Jean Baptiste Pierre Antoine de Monet de, 1744-1829; Metzelaar, J. [Translator]
 (DIR) Zoölogy: The Science of Animal Life Popular Science Library, Volume 
       By Ingersoll, Ernest, 1852-1946
 (DIR) Zwischen Pol und Äquator: Tiergeographische Lebensbilder
       By Floericke, Kurt, 1869-1934; Oeffinger, Rudolf, 1870-1952 [Illustrator]
 (DIR) Études sur la flore du Sénégal
       By Vallot, Joseph, 1854-1925
 (DIR) Über den Bildungstrieb
       By Blumenbach, Johann Friedrich, 1752-1840
 (DIR) Über die Entstehung der Arten im Thier- und Pflanzen-Reich durch natü
       By Darwin, Charles, 1809-1882; Bronn, H. G. (Heinrich Georg), 1800-1862 [Translator]
 (DIR) Über die Vulkane im Monde
       By Kant, Immanuel, 1724-1804
 (DIR) Μικρά Φυσικά, Τόμος Δεύτερος
       By Aristotle, 385 BCE-323 BCE; Gratsiatos, Paulos [Translator]
 (DIR) Μικρά Φυσικά, Τόμος Πρώτος
       By Aristotle, 385 BCE-323 BCE; Gratsiatos, Paulos [Translator]