The Walschaert Locomotive Valve Gear. By W. W. Wood. 4 plates and set of movable cardboard working models of the valves, 193 pp., crown 8vo. (New York, 1912.) 6s. 6d. net.

The Westinghouse E.T. Air-Brake Instruction Pocket Book. By W. W. Wood. 48 illus., including many coloured plates, 242 pp., crown 8vo. (New York, 1909.) 8s. 6d. net.


SANITATION, PUBLIC HEALTH AND MUNICIPAL ENGINEERING

Sewers and Drains for Populous Districts. By J. W. Adams. Ninth edition, 81 illus., 236 pp., 8vo. (New York, 1902.) 10s. 6d. net.

Engineering Work in Public Buildings. By R. O. Allsop. 77 illus., ix + 158 pp., demy 4to. (1912.) 12s. 6d. net.

Public Abattoirs, their Planning, Design and Equipment. By R. S. Ayling. 33 plates, 100 pp., demy 4to. (1908.) 8s. 6d. net.

Sewage Purification. By E. Bailey-Denton. 8 plates, 44 pp., 8vo. (1896.) 5s.

Water Supply and Sewerage of Country Mansions and Estates. By E. Bailey-Denton. 76 pp., crown 8vo. (1901.) 2s. 6d. net.