Paper, 25 Webb's Railroad Construction. 16mo, morocco, 5 00 Economics of Railroad Construction. Large 12mo, 2 50 Wellington's Economic Theory of the Location of Railways. Small 8vo, 5 00 DRAWING. Barr's Kinematics of Machinery. 8vo, 2 50 * Bartlett's Mechanical Drawing. 8vo, 3 00 * " " " Abridged Ed. 8vo, 1 50 Coolidge's Manual of Drawing. 8vo, paper, 1 00 Coolidge and Freeman's Elements of General Drafting for Mechanical Engineers. Oblong 4to, 2 50 Durley's Kinematics of Machines. 8vo, 4 00 Emch's Introduction to Projective Geometry and its Applications. 8vo, 2 50 Hill's Text-book on Shades and Shadows, and Perspective. 8vo, 2 00 Jamison's Elements of Mechanical Drawing. 8vo, 2 50 Advanced Mechanical Drawing. 8vo, 2 00 Jones's Machine Design: Part I. Kinematics of Machinery. 8vo, 1 50 Part II. Form, Strength, and Proportions of Parts. 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 MacLeod's Descriptive Geometry. Small 8vo, 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 Course in Mechanical Drawing. 8vo, 2 00 Text-book of Mechanical Drawing and Elementary Machine Design. 8vo, 3 00 Robinson's Principles of Mechanism. 8vo, 3 00 Schwamb and Merrill's Elements of Mechanism. 8vo, 3 00 Smith's (R. S.) Manual of Topographical Drawing. (McMillan.) 8vo, 2 50 Smith (A. W.) and Marx's Machine Design. 8vo, 3 00 * Titsworth's Elements of Mechanical Drawing. Oblong 8vo, 1 25 Warren's Elements of Plane and Solid Free-hand Geometrical Drawing. 12mo, 1 00 Drafting Instruments and Operations. 12mo, 1 25 Manual of Elementary Projection Drawing. 12mo, 1 50