8vo, 2 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 Tillson's Street Pavements and Paving Materials. 8vo, 4 00 Turneaure and Maurer's Principles of Reinforced Concrete Construction. 8vo, 3 00 Waddell's De Pontibus. (A Pocket-book for Bridge Engineers.) 16mo, mor., 2 00 * Specifications for Steel Bridges. 12mo, 50 Wood's (De V.) Treatise on the Resistance of Materials, and an Appendix on the Preservation of Timber. 8vo, 2 00 Wood's (De V.) Elements of Analytical Mechanics. 8vo, 3 00 Wood's (M. P.) Rustless Coatings: Corrosion and Electrolysis of Iron and Steel. 8vo, 4 00 RAILWAY ENGINEERING. Andrew's Handbook for Street Railway Engineers. 3x5 inches, morocco, 1 25 Berg's Buildings and Structures of American Railroads. 4to, 5 00 Brook's Handbook of Street Railroad Location. 16mo, morocco, 1 50 Butt's Civil Engineer's Field-book. 16mo, morocco, 2 50 Crandall's Transition Curve. 16mo, morocco, 1 50 Railway and Other Earthwork Tables. 8vo, 1 50 Crookett's Methods for Earthwork Computations. (In Press) Dawson's "Engineering" and Electric Traction Pocket-book. 16mo, morocco, 5 00 Dredge's History of the Pennsylvania Railroad: (1879). Paper, 5 00 Fisher's Table of Cubic Yards. Cardboard, 25 Godwin's Railroad Engineers' Field-book and Explorers' Guide. 16mo, mor., 2 50 Hudson's Tables for Calculating the Cubic Contents of Excavations and Embankments. 8vo, 1 00 Molitor and Beard's Manual for Resident Engineers. 16mo, 1 00 Nagle's Field Manual for Railroad Engineers. 16mo, morocco, 3 00 Philbrick's Field Manual for Engineers. 16mo, morocco, 3 00 Raymond's Elements of Railroad Engineering. (In Press.) Searles's Field Engineering. 16mo, morocco, 3 00 Railroad Spiral. 16mo, morocco, 1 50 Taylor's Prismoidal Formulæ and Earthwork. 8vo, 1 50 * Trautwine's Method of Calculating the Cube Contents of Excavations and Embankments by the Aid of Diagrams. 8vo, 2 00 The Field Practice of Laying Out Circular Curves for Railroads. 12mo, morocco, 2 50 Cross-section Sheet.