Part II. Design, Construction, and Operation. 8vo, 6 00

Handbook of Engine and Boiler Trials, and the Use of the Indicator and the Prony Brake. 8vo, 5 00 Stationary Steam-engines. 8vo, 2 50 Steam-boiler Explosions in Theory and in Practice. 12mo, 1 50 Manual of Steam-boilers, their Designs, Construction, and Operation. 8vo, 5 00 Wehrenfennig's Analysis and Softening of Boiler Feed-water. (Patterson.) 8vo, 4 00 Weisbach's Heat, Steam, and Steam-engines. (Du Bois.) 8vo, 5 00 Whitham's Steam-engine Design. 8vo, 5 00 Wood's Thermodynamics, Heat Motors, and Refrigerating Machines. 8vo, 4 00

MECHANICS AND MACHINERY.

Barr's Kinematics of Machinery. 8vo, 2 50 * Bovey's Strength of Materials and Theory of Structures. 8vo, 7 50 Chase's The Art of Pattern-making. 12mo, 2 50 Church's Mechanics of Engineering. 8vo, 6 00 Notes and Examples in Mechanics. 8vo, 2 00 Compton's First Lessons in Metal-working. 12mo, 1 50 Compton and De Groodt's The Speed Lathe. 12mo, 1 50 Cromwell's Treatise on Toothed Gearing. 12mo, 1 50 Treatise on Belts and Pulleys. 12mo, 1 50 Dana's Text-book of Elementary Mechanics for Colleges and Schools. 12mo, 1 50 Dingey's Machinery Pattern Making. 12mo, 2 00 Dredge's Record of the Transportation Exhibits Building of the World's Columbian Exposition of 1893. 4to, half morocco, 5 00 Du Bois's Elementary Principles of Mechanics: Vol. I. Kinematics. 8vo, 3 50 Vol. II. Statics. 8vo, 4 00 Mechanics of Engineering. Vol. I. Small 4to, 7 50 Vol. II. Small 4to, 10 00 Durley's Kinematics of Machines. 8vo, 4 00 Fitzgerald's Boston Machinist. 16mo, 1 00 Flather's Dynamometers, and the Measurement of Power. 12mo, 3 00 Rope Driving. 12mo, 2 00 Goss's Locomotive Sparks. 8vo, 2 00 Locomotive Performance. 8vo, 5 00 * Greene's Structural Mechanics. 8vo, 2 50 Hall's Car Lubrication. 12mo, 1 00 Hobart and Ellis's High-speed Dynamo Electric Machinery. (In Press.) Holly's Art of Saw Filing. 18mo, 75 James's Kinematics of a Point and the Rational Mechanics of a Particle. Small 8vo, 2 00 * Johnson's (W. W.) Theoretical Mechanics. 12mo, 3 00 Johnson's (L. J.) Statics by Graphic and Algebraic Methods. 8vo, 2 00 Jones's Machine Design: