Hill’s Text-book on Shades and Shadows, and Perspective 8vo, 2 00 Jamison’s Elements of Mechanical Drawing. (_In press._) 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 * Mahan’s Descriptive Geometry and Stone-cutting 8vo, 1 50 Industrial Drawing. (Thompson.) 8vo, 3 50 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 Smith’s Manual of Topographical Drawing. (McMillan.) 8vo, 2 50 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 Manual of Elementary Problems in the Linear Perspective of Form and Shadow 12mo, 1 00 Plane Problems in Elementary Geometry 12mo, 1 25 Primary Geometry 12mo, 75 Elements of Descriptive Geometry, Shadows, and Perspective 8vo, 3 50 General Problems of Shades and Shadows 8vo, 3 00 Elements of Machine Construction and Drawing 8vo, 7 50 Problems, Theorems, and Examples in Descriptive Geometry 8vo, 2 50 Weisbach’s Kinematics and the Power of Transmission. (Herrmann and Klein.) 8vo, 5 00 Whelpley’s Practical Instruction in the Art of Letter Engraving 12mo, 2 00 Wilson’s Topographic Surveying 8vo, 3 50 Free-hand Perspective 8vo, 2 50 Free-hand Lettering 8vo, 1 00 Woolf’s Elementary Course in Descriptive Geometry Large 8vo, 3 00 =ELECTRICITY AND PHYSICS.= Anthony and Brackett’s Text-book of Physics. (Magie.) Small 8vo, 3 00 Anthony’s Lecture-notes on the Theory of Electrical Measurements 12mo, 1 00