Solid Bitumens. By S. F. Peckham. 23 illus., 324 pp., 8vo. (New York, 1909.) £1 1s. net.
Lubricants, Oils and Greases. By I. I. Redwood. 3 plates, ix + 54 pp., 8vo. (1898.) 6s. 6d. net.
Practical Treatise on Mineral Oils and their By-Products. By I. I. Redwood. 76 illus., 336 pp., 8vo. (1914.) 10s. 6d. net.
Silico-Calcareous Sandstones, or Building Stones from Quartz, Sand and Lime. By E. Stoffler. 5 plates, 8vo, sewed. (1901.) 4s. net.
Proceedings of the Fifth Congress, International Association for Testing Materials. English edition. 189 illus., 549 pp., 8vo. (1910.) 18s. net.
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MATHEMATICS
Imaginary Quantities. By M. Argand. Translated by Prof. Hardy. 18mo, boards. (New York.) 1881. 2s. net.
Text-book of Practical Solid Geometry. By E. H. de V. Atkinson. Revised by Major B. R. Ward, R.E. Second edition, 17 plates, 134 pp., 8vo. (1913.) 7s. 6d.