Spons’ Tables and Memoranda for Engineers. By J. T. Hurst, C.E. Twelfth edition, 278 pp., 64mo, roan, gilt edges. (1907.) 1s. net. Ditto ditto in celluloid case, 1s. 6d. net.

Optical Tables and Data, for the use of Opticians. By Prof. S. P. Thompson. Second edition, 130 pp., oblong 8vo. (1907.) 6s. net.

Traverse Table, showing Latitudes and Departure for each Quarter degree of the Quadrant, and for distances from 1 to 100, etc. 18mo, boards. 2s. net.

Fifty-four Hours’ Wages Calculator. By H. N. Whitelaw. Second edition, 79 pp., 8vo. 2s. 6d. net.

Wheel Gearing. Tables of Pitch Line Diameters, etc. By A. Wildgoose and A. J. Orr. 175 pp., fcap. 32mo. 2s. net.


MISCELLANEOUS

The Atmosphere: Its Characteristics and Dynamics. By F. J. B. Cordeiro. 35 illus., 129 pp., crown 4to. (New York, 1910.) 10s. 6d. net.

Popular Engineering. By F. Dye. 704 illus., 477 pp., crown 4to. (1895.) 5s. net.