—— Oil Colors, and Printers’ Ink. Trans. by A. Morris and H. Robson. 8vo, *2 50 —— Treatment of Paper for Special Purposes. Trans. by C. Salter. 12mo, *2 50 Annual Reports on the Progress of Chemistry. Vol. I. (1904). 8vo, *2 00 Vol. II. (1905). 8vo, *2 00 Vol. III. (1906). 8vo, *2 00 Vol. IV. (1907). 8vo, *2 00 Vol. V. (1908). 8vo, *2 00 Vol. VI. (1909). 8vo, *2 00 Arnold, E. Armature Windings of Direct-Current Dynamos. Trans. by F. B. DeGress. 8vo, *2 00 Ashe, S. W., and Keiley, J. D. Electric Railways. Theoretically and Practically Treated. Vol. I. Rolling Stock. 12mo, *2 50 Ashe, S. W. Electric Railways. Vol. II. Engineering Preliminaries and Direct Current Sub-Stations. 12mo, *2 50 —— Electricity: Experimentally and Practically Applied. 12mo, *2 00 Atkinson, A. A. Electrical and Magnetic Calculations. 8vo, *1 50 Atkinson, P. The Elements of Electric Lighting. 12mo, 1 50 —— The Elements of Dynamic Electricity and Magnetism. 12mo, 2 00 —— Power Transmitted by Electricity. 12mo, 2 00 Auchincloss, W. S. Link and Valve Motions Simplified. 8vo, *1 50 Ayrton, H. The Electric Arc. 8vo, *5 00 Bacon, F. W. Treatise on the Richards Steam-Engine Indicator. 12mo, 1 00 Bailes, G. M. Modern Mining Practice. Five Volumes. 8vo, each, 3 50 Bailey, R. D. The Brewers’ Analyst. 8vo, *5 00 Baker, A. L. Quaternions. 8vo (_In Preparation._) Baker, M. N. Potable Water. (Science Series.). 16mo, 0 50 Baker, T. T. Telegraphic Transmission of Photographs. 12mo, *1 25 Bale, G. R. Modern Iron Foundry Practice. Two Volumes. 12mo. Vol. I. Foundry Equipment, Materials Used. *2 50 Vol. II. Machine Moulding and Moulding Machines. *1 50 Bale, M. P. Pumps and Pumping. 12mo, 1 50 Ball, R. S. Popular Guide to the Heavens. 8vo, *4 50 —— Natural Sources of Power. (Westminster Series.). 8vo, *2 00 Ball, W. V. Law Affecting Engineers. 8vo, *3 50 Barba, J. Use of Steel for Constructive Purposes. 12mo, 1 00 Barker, A. H. Graphic Methods of Engine Design. 12mo, *1 50 Barker, A. Textiles and Their Manufacture. (Westminster Series.). 8vo, 2 00