* Elements of the Art of War 8vo, 4 00 Metcalfe’s Cost of Manufactures--And the Administration of Workshops, Public and Private 8vo, 5 00 * Ordnance and Gunnery. 2 vols. 12mo, 5 00 Murray’s Infantry Drill Regulations 18mo, paper, 10 Peabody’s Naval Architecture 8vo, 7 50 * Phelps’s Practical Marine Surveying 8vo, 2 50 Powell’s Army Officer’s Examiner 12mo, 4 00 Sharpe’s Art of Subsisting Armies in War 18mo, morocco, 1 50 Walke’s Lectures on Explosives 8vo, 4 00 * Wheeler’s Siege Operations and Military Mining 8vo, 2 00 Winthrop’s Abridgment of Military Law 12mo, 2 50 Woodhull’s Notes on Military Hygiene 16mo, 1 50 Young’s Simple Elements of Navigation 16mo, morocco, 1 00 Second Edition, Enlarged and Revised 16mo, morocco, 2 00 =ASSAYING.= Fletcher’s Practical Instructions in Quantitative Assaying with the Blowpipe. 12mo, morocco, 1 50 Furman’s Manual of Practical Assaying 8vo, 3 00 Miller’s Manual of Assaying 12mo, 1 00 O’Driscoll’s Notes on the Treatment of Gold Ores 8vo, 2 00 Ricketts and Miller’s Notes on Assaying 8vo, 3 00 Ulke’s Modern Electrolytic Copper Refining 8vo, 3 00 Wilson’s Cyanide Processes 12mo, 1 50 Chlorination Process 12mo, 1 50 =ASTRONOMY.= Comstock’s Field Astronomy for Engineers 8vo, 2 50 Craig’s Azimuth 4to, 3 50 Doolittle’s Treatise on Practical Astronomy 8vo, 4 00 Gore’s Elements of Geodesy 8vo, 2 50 Hayford’s Text-book of Geodetic Astronomy 8vo, 3 00 Merriman’s Elements of Precise Surveying and Geodesy 8vo, 2 50 * Michie and Harlow’s Practical Astronomy 8vo, 3 00 * White’s Elements of Theoretical and Descriptive Astronomy 12mo, 2 00 =BOTANY.= Davenport’s Statistical Methods, with Special Reference to Biological Variation. 16mo, morocco, 1 25 Thomé and Bennett’s Structural and Physiological Botany 16mo, 2 25 Westermaier’s Compendium of General Botany. (Schneider.) 8vo, 2 00 =CHEMISTRY.=