Reagan’s Locomotives: Simple, Compound, and Electric 12mo, 2 50 Reid’s Course in Mechanical Drawing 8vo, 2 00 Text-book of Mechanical Drawing and Elementary Machine Design 8vo, 3 00 Richards’s Compressed Air 12mo, 1 50 Robinson’s Principles of Mechanism 8vo, 3 00 Ryan, Norris, and Hoxie’s Electrical Machinery. Vol. I 8vo, 2 50 Sinclair’s Locomotive Engine Running and Management 12mo, 2 00 Smith’s Press-working of Metals 8vo, 3 00 Materials of Machines 12mo, 1 00 Spangler, Greene, and Marshall’s Elements of Steam-engineering 8vo, 3 00 Thurston’s Treatise on Friction and Lost Work in Machinery and Mill Work 8vo, 3 00 Animal as a Machine and Prime Motor, and the Laws of Energetics 12mo, 1 00 Warren’s Elements of Machine Construction and Drawing 8vo, 7 50 Weisbach’s Kinematics and the Power of Transmission. (Herrmann--Klein.) 8vo, 5 00 Machinery of Transmission and Governors. (Herrmann--Klein.) 8vo, 5 00 Wood’s Elements of Analytical Mechanics 8vo, 3 00 Principles of Elementary Mechanics 12mo, 1 25 Turbines 8vo, 2 50 The World’s Columbian Exposition of 1893 4to, 1 00 =METALLURGY.= Egleston’s Metallurgy of Silver, Gold, and Mercury: Vol. I.--Silver 8vo, 7 50 Vol. II.--Gold and Mercury 8vo, 7 50 ** Iles’s Lead-smelting. (Postage 9 cents additional.) 12mo, 2 50 Keep’s Cast Iron 8vo, 2 50 Kunhardt’s Practice of Ore Dressing in Europe 8vo, 1 50 Le Chatelier’s High-temperature Measurements. (Boudouard--Burgess.) 12mo, 3 00 Metcalf’s Steel. A Manual for Steel-users 12mo, 2 00 Smith’s Materials of Machines 12mo, 1 00 Thurston’s Materials of Engineering. In Three Parts 8vo, 8 00 Part II.--Iron and Steel 8vo, 3 50 Part III.--A Treatise on Brasses, Bronzes, and Other Alloys and their Constituents 8vo, 2 50 Ulke’s Modern Electrolytic Copper Refining 8vo, 3 00 =MINERALOGY.=