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 Hydraulics and Hydraulic Motors. (Du Bois.) 8vo, 5 00 Wolff’s Windmill as a Prime Mover 8vo, 3 00 Wood’s Turbines 8vo, 2 50 =MATERIALS OF ENGINEERING.= Bovey’s Strength of Materials and Theory of Structures 8vo, 7 50 Burr’s Elasticity and Resistance of the Materials of Engineering. 6th Edition, Reset 8vo, 7 50 Church’s Mechanics of Engineering 8vo, 6 00 Johnson’s Materials of Construction Large 8vo, 6 00 Keep’s Cast Iron 8vo, 2 50 Lanza’s Applied Mechanics 8vo, 7 50 Martens’s Handbook on Testing Materials. (Henning.) 8vo, 7 50 Merriman’s Text-book on the Mechanics of Materials 8vo, 4 00 Strength of Materials 12mo, 1 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 3 vols., 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 Text-book of the Materials of Construction 8vo, 5 00 Wood’s Treatise on the Resistance of Materials and an Appendix on the Preservation of Timber 8vo, 2 00 Elements of Analytical Mechanics 8vo, 3 00 Wood’s Rustless Coatings: Corrosion and Electrolysis of Iron and Steel 8vo, 4 00 =STEAM-ENGINES AND BOILERS.= Carnot’s Reflections on the Motive Power of Heat. (Thurston.) 12mo, 1 50 Dawson’s “Engineering” and Electric Traction Pocket-book 16mo, mor., 5 00 Ford’s Boiler Making for Boiler Makers 18mo, 1 00 Goss’s Locomotive Sparks 8vo, 2 00 Hemenway’s Indicator Practice and Steam-engine Economy 12mo, 2 00