Water Softening and Purification. By H. Collet. Second edition, 6 illus., 170 pp., crown 8vo. (1908.) 5s. net.

Treatise on Water Supply, Drainage and Sanitary Appliances of Residences. By F. Colyer. 100 pp., crown 8vo. (1899.) 1s. 6d. net.

Purification of Public Water Supplies. By J. W. Hill. 314 pp., 8vo. (New York, 1898.) 10s. 6d.

Well Boring for Water, Brine and Oil. By C. Isler. Second edition, 105 illus., 296 pp., 8vo. (1911.) 10s. 6d. net.

Method of Measuring Liquids Flowing through Pipes by means of Meters of Small Calibre. By Prof. G. Lange. 1 plate, 16 pp., 8vo, sewed. (1907.) 6d. net.

On Artificial Underground Water. By G. Richert. 16 illus., 33 pp., 8vo, sewed. (1900.) 1s. 6d. net.

Notes on Water Supply in new Countries. By F. W. Stone. 18 plates, 42 pp., crown 8vo. (1888.) 5s.

The Principles of Waterworks Engineering. By J. H. T. Tudsbery and A. W. Brightmore. Third edition, 13 folding plates, 130 illus., 447 pp., demy 8vo. (1905.) £1 1s. net.

WORKSHOP PRACTICE