Railroad Spiral 16mo, mor. 1 50 Taylor’s Prismoidal Formulæ and Earthwork 8vo, 1 50 Webb’s Economics of Railroad Construction Large 12mo, 2 50 Railroad Construction 16mo, mor. 5 00 Wellington’s Economic Theory of the Location of Large 12mo, 5 00 Railways Wilson’s Elements of Railroad-Track and Construction 12mo, 2 00 DRAWING Barr and Wood’s Kinematics of Machinery 8vo, 2 50 * Bartlett’s Mechanical Drawing 8vo, 3 00 * Bartlett’s Mechanical Drawing Abridged Ed. 8vo, 1 50 * Bartlett and Johnson’s Engineering Descriptive 8vo, 1 50 Geometry Blessing and Darling’s Descriptive Geometry. (In Press.) Elements of Drawing. (In Press.) Coolidge’s Manual of Drawing 8vo, paper, 1 00 Coolidge and Freeman’s Elements of General Drafting Oblong 4to, 2 50 for Mechanical Engineers Durley’s Kinematics of Machines 8vo, 4 00 Emch’s Introduction to Projective Geometry and its 8vo, 2 50 Application Hill’s Text-book on Shades and Shadows, and 8vo, 2 00 Perspective Jamison’s Advanced Mechanical Drawing 8vo, 2 00 Elements of Mechanical Drawing 8vo, 2 50 Jones’s Machine Design: Part I. Kinematics of Machinery 8vo, 1 50 Part II. Form, Strength, and Proportions of 8vo, 3 00 Parts * Kimball and Barr’s Machine Design 8vo, 3 00 MacCord’s Elements of Descriptive Geometry 8vo, 3 00 Kinematics; or, Practical Mechanism 8vo, 5 00 Mechanical Drawing 4to, 4 00 Velocity Diagrams 8vo, 1 50 McLeod’s Descriptive Geometry Large 12mo, 1 50 * Mahan’s Descriptive Geometry and Stone-cutting 8vo, 1 50 Industrial Drawing. (Thompson.) 8vo, 3 50 Moyer’s Descriptive Geometry 8vo, 2 00 Reed’s Topographical Drawing and Sketching 4to, 5 00 * Reid’s Mechanical Drawing. (Elementary and 8vo, 2 00 Advanced.) Text-book of Mechanical Drawing and Elementary 8vo, 3 00 Machine Design Robinson’s Principles of Mechanism 8vo, 3 00 Schwamb and Merrill’s Elements of Mechanism 8vo, 3 00 Smith (A. W.) and Marx’s Machine Design 8vo, 3 00 Smith’s (R. S.) Manual of Topographical Drawing. 8vo, 2 50 (McMillan.) * Titsworth’s Elements of Mechanical Drawing Oblong 8vo, 1 25