The language used in this ebook is that of the source document, including unusual or archaic spelling. The book was partly written by representatives of the industries concerned; inconsistencies in grammar, spelling, punctuation (including the use of decimal points and commas), style, lay-out, etc. have been retained. Contradictions and repetitions have not been addressed. Alphabetical sorting inconsistencies in the index have not been corrected. Not all illustrations in the source document are of the same quality, which is visible in this e-text.
Page 59, ... the six points making a star ...: as printed in the source document, although the six points do not make the star as printed.
Page 218, ... and have them meet as shown in Fig. 13 ...: The illustrations in this chapter are not numbered. The illustration on page 215 shows the described meeting of the shields; the hyperlink goes to this illustration.
Page 305, ... (as shown in Fig. 4): the illustrations with this article are not numbered.
Page 307, The X-rays are discharged in straight lines as shown in the figure: there is no such figure in the book.
Pages 328 and 330: page headings WHAT A LODESTONE IS and WHAT ELECTRICITY IS do not relate to the contents of the pages.
Page 336, The pictures shown on the following pages ...: as printed; the illustrations are given on previous pages.
Page 364, reference to figure 6: presumably the four illustrations on this page together form figure 6.
Page 368, When you put oil on the axle, however, ...: some text may be missing.
Page 376, ... or three-sixty-fourths of a second, and: as printed in the source document; some text is obviously missing.
Page 489, ... of much importance. The two classes, only two of which are of much importance. The two classes ...: the redundant text is as printed in the source document.
Page 491: There is no Fig. 4 in the source document; the unnumbered figure in the bottom right of the page is assumed to be Fig. 4.
Page 502, captions with bottom illustration: at least one of the lengths given (4650 and 4560 feet) is likely to be a typographical error.
Page 530, illustration: as printed in the source document; presumably development starts at the bottom right of the photograph.
Page 547, (The welt shoe has always been considered ...: the closing bracket is lacking.
Changes made:
Some minor obvious punctuation and typographical errors and unnecessarily repeated words have been corrected silently.
Illustrations have been moved out of text paragraphs. Page headers have been transcribed as illustration captions (on top of illustrations) or as side notes at a suitable location on the page concerned, so that their reference in the index is (at least approximately) correct.
Text that was not present as such in the source document but that was transcribed from within illustrations is given in a dashed box.
Page 29: ... never see the distance target or vessel ... changed to ... never see the distant target or vessel ....
Page 46: Lock á là Miquelet changed to Lock à la Miquelet.
Pages 74-75: closing double quotes inserted after ... went that very night.; ... had to look after it themselves.; ... speech had really been electrically reproduced. Opening double quotes inserted before Now, it so happened there, ...; My friend, Mr. William Hubbard, ....
Page 114: ... the white mulberry or osage orange are fed the young worms ... changed to ... the white mulberry or osage orange are fed the young worm ....
Page 124: ... called an ablate spheroid ... changed to ... called an oblate spheroid ....
Page 126: Dr. Samuel Pierrpont Langley changed to Dr. Samuel Pierpont Langley.
Page 167: ... against the loose row of cross threads to lighten it ... changed to ... against the loose row of cross threads to tighten it ....
Page 205: ... than the heat will cause the air to expand suddenly ... changed to ... that the heat will cause the air to expand suddenly ...; ... a mixture of potassium, nitrate, or saltpeter, with powdered charcoal and phur ... changed to ... a mixture of potassium nitrate, or saltpeter, with powdered charcoal and sulphur ....
Page 229: ... other machines called Mills,” ... changed to ... other machines called “Mills,” ....; ... which also adds in the drying and the working ... changed to ... which also aids in the drying and the working ....
Page 265: ... there is another, solium, which is solid ... changed to ... there is another, sodium, which is solid ...; ... what is called a reverbratory furnace ... changed to what is called a reverberatory furnace ....
Page 292: PROMOTHEAN MATCH changed to PROMETHEAN MATCH.
Page 375: This toy we speak of was called a zoctrope changed to This toy we speak of was called a zoetrope.
Page 376: ... projected at the rate of fourteen or sixteen to the minute ... changed to ... projected at the rate of fourteen or sixteen to the second ....
Page 377: Footnote anchor [4] inserted.
Page 414 ff.: Ellipses (...) have been added surrounding the continuing page headings and illustration captions.
Pages 419 and 438, Morse codes: for the sake of clarity, the spacing between individual dashes and dots has been increased slightly.
Page 490: ... if a red flag really makes a bull more exited ... changed to ... if a red flag really makes a bull more excited ....
Page 493: The chemical name for salt is sodium which is derived ... changed to The chemical name for salt is sodium chloride which is derived ...; ... substances around us are composed of these elements along, or ... changed to ... substances around us are composed of these elements alone, or ....
Page 522, illustration Palmary Impressions: rotated 90° clockwise.
Page 550: ... for which the lingings were intended. After all the lingings have been prepared ... changed to ... for which the linings were intended. After all the linings have been prepared ....
Index: several missing punctuation marks inserted for consistency.
Page 583: Curtis biplane changed to Curtiss biplane.
Page 585: Burline (illus.) changed to Burling (illus.)
Page 586: Culverines, early type of changed to Culverins, early type of.
Page 587: steal and flint changed to steel and flint.
Page 588: Flying boot, interior arrangement changed to Flying boat, interior arrangement.
Page 589: (How) the pictures in this both are made changed to (How) the pictures in this book are made.
Page 590: (How) did shaking the head come to come no? changed to (How) did shaking the head come to mean no?; (How) does does the wool in a suit of clothes cost? changed to (How) much does the wool in a suit of clothes cost?; Hurt, why we cry changed to Hurt, why we cry when, 93.
Page 591: the “Reverbere” changed to the “Réverbère”; (Lamp) from Nashagak hanging changed to (Lamp) from Nushagak hanging.
Page 592: promothean changed to promethean.
Page 593: Kurdestan (illus.) changed to Kurdistan (illus.).
Page 595: Crakron or peaked changed to Crakrow or peaked.
Page 597: omniscope changed to Omniscope; cucular diffusion battery in factory changed to circular diffusion battery in factory.
Page 601: (Who) who make the first felt hat? changed to (Who) made the first felt hat?; (Why) don’t an elevator fall? changed to (Why) doesn’t an elevator fall?
Page 603: (Writing) pen invention of, 00 changed to (Writing) pen, invention of, 11.