METALLURGY. Betts’s Lead Refining by Electrolysis 8vo, 4 00 Bolland’s Encyclopedia of Founding and Dictionary of 12mo, 3 00 Foundry Terms used in the Practice of Moulding Iron Founder 12mo, 2 50 Iron Founder Supplement 12mo, 2 50 * Borchers’s Metallurgy. (Hall and Hayward.) 8vo, 3 00 * Burgess and Le Chatelier’s Measurement of High 8vo, 4 00 Temperatures. Third Edition Douglas’s Untechnical Addresses on Technical Subjects 12mo, 1 00 Goesel’s Minerals and Metals: A Reference Book 16mo, mor. 3 00 * Iles’s Lead-smelting 12mo, 2 50 Johnson’s Rapid Methods for the Chemical Analysis of Large 12mo, 3 00 Special Steels, Steel-making Alloys and Graphite Keep’s Cast Iron 8vo, 2 50 Metcalf’s Steel. A Manual for Steel-users 12mo, 2 00 Minet’s Production of Aluminum and its Industrial 12mo, 2 50 Use. (Waldo.) * Palmer’s Foundry Practice Large 12mo, 2 00 * Price and Meade’s Technical Analysis of Brass 12mo, 2 00 * Ruer’s Elements of Metallography. (Mathewson.) 8vo, 3 00 Smith’s Materials of Machines 12mo, 1 00 Tate and Stone’s Foundry Practice 12mo, 2 00 Thurston’s Materials of Engineering. In Three Parts 8vo, 8 00 Part I. Non-metallic Materials of Engineering, see Civil Engineering, page 9 Part II. Iron and Steel 8vo, 3 50 Part III. A Treatise on Brasses, Bronzes, and 8vo, 2 50 Other Alloys and their Constituents Ulke’s Modern Electrolytic Copper Refining 8vo, 3 00 West’s American Foundry Practice 12mo, 2 50 Moulders’ Text Book 12mo, 2 50 MINERALOGY. * Browning’s Introduction to the Rarer Elements 8vo, 1 50 Brush’s Manual of Determinative Mineralogy. 8vo, 4 00 (Penfield.) Butler’s Pocket Hand-book of Minerals 16mo, mor. 3 00 Chester’s Catalogue of Minerals 8vo, paper, 1 00 Cloth, 1 25 * Crane’s Gold and Silver 8vo, 5 00 Dana’s First Appendix to Dana’s New “System of Large 8vo, 1 00 Mineralogy.” Dana’s Second Appendix to Dana’s New “System of Large 8vo, 1 50 Mineralogy.” Manual of Mineralogy and Petrography 12mo, 2 00 Minerals and How to Study Them 12mo, 1 50