GROSSMANN, J. Ammonia and Its Compounds. Illustrated. 12mo. cloth. 151 pp.net, $1.25
HALE, WILLIAM J. Calculations in General Chemistry. With definitions, explanations and problems. Second Edition, revised. 12mo. cloth. 185 pp.net, $1.00
HALL, CLARE H. Chemistry of Paints and Paint Vehicles. 8vo. cloth. 141 pp.net, $2.00
HILDITCH, T. P. A Concise History of Chemistry. 16 diagrams. 12mo. cloth. 273 pp.net, $1.25
HOPKINS, N. M. Experimental Electrochemistry: Theoretically and Practically Treated. New Edition.In Press.
HOULLEVIGUE, L. The Evolution of the Sciences. 8vo. cloth. 377 pp.net, $2.00
HÜBNER, JULIUS. Bleaching and Dyeing of Vegetable Fibrous Materials. 95 illus. (many in two colors). 8vo. cloth. 457 pp.net, $5.00
HUDSON, O. F. Iron and Steel. An introductory textbook for engineers and metallurgists. With a section on Corrosion by Guy D. Bengough. 47 illus. 8vo. cloth. 184 pp.net, $2.00
HURST, GEO. H. Lubricating Oils, Fats and Greases. Their origin, preparation, properties, uses, and analysis. Third Edition, revised and enlarged, by Henry Leask. 74 illus. 8vo. cloth. 405 p.net, $4.00
HURST, G. H., and SIMMONS, W. H. Textile Soaps and Oils. Second Edition, revised and partly rewritten. 11 illustrations. 51⁄2 x 83⁄4. 204 pp.net, $3.00