MATHEMATICS.

Imaginary Quantities. By M. Argand. Translated by Prof. Hardy. 18mo, boards. (New York) net  20
Text Book of Practical Solid Geometry. By E. H. de V. Atkinson. Revised by Major B. R. Ward, R.E. Second edition, 17 plates, 8vo. (1901)  76
Quick and Easy Methods of Calculating, and the Theory and Use of the Slide Rule. By R. G. Blaine. Third edition, 6 illus. 152 pp. 16mo, leather cloth. (1907)  26
Symbolic Algebra, or the Algebra of Algebraic Numbers. By W. Cain. 18mo, boards. (New York) net  20
Nautical Astronomy. By J. H. Colvin. 127 pp. crown, 8vo. (1901) net  26
Chemical Problems. By J. C. Foye. Fourth edition, 141 pp. 18mo, boards. (New York, 1898) net  20
Primer of the Calculus. By E. S. Gould. Second edition, 24 illus. 122 pp. 18mo, boards. (New York, 1899) net  20
Elementary Treatise on the Calculus for Engineering Students. By J. Graham. Third edition, 276 pp. crown 8vo. (1905). (Finsbury Technical Manual)  76
Manual of the Slide Rule. By F. A. Halsey. Second edition, 31 illus. 84 pp. 18mo, boards. (New York, 1901) net  20
Reform in Chemical and Physical Calculations. By C. J. T. Hanssen. 4to. (1897) net  66
Algebra Self-Taught. By P. Higgs. Third edition, 104 pp. crown 8vo. (1903)  26
Galvanic Circuit investigated Mathematically. By G. S. Ohm. Translated by William Francis. 269 pp. 18mo, boards. (New York, 1891) net  20
Elementary Practical Mathematics. By M. T. Ormsby. 420 pp. demy 8vo. (1900) net  76
Elements of Graphic Statics. By K. Von Ott. Translated by G. S. Clarke. 93 illus. 128 pp. crown 8vo. (1901)  50
Figure of the Earth. By F. C. Roberts. 18mo, boards. (New York) net  20
Arithmetic of Electricity. By T. O’C. Sloane. Thirteenth edition, crown 8vo. (New York, 1901) net  46
Graphic Method for Solving certain Questions in Arithmetic or Algebra. By G. L. Vose. Second edition with 28 illus. 62 pp. 18mo, boards. (New York, 1902) net  20
Problems in Electricity. A Graduated Collection comprising all branches of Electrical Science. By R. Weber. Translated from the French by E. A. O’Keefe. 34 illus. 366 pp. crown 8vo. (1902) net  76