8vo, cloth 4 00 Full calf 6 00 *GRUNER, M. L.--The Manufacture of Steel.* Translated from the French, by Lenox Smith, with an appendix on the Bessemer process in the United States, by the translator. Illustrated. 8vo, cloth 3 50 *GUIDE TO WEST POINT and the U. S. Military Academy.* With maps and engravings. 18mo, flexible cloth 1 00 *HALF-HOURS WITH MODERN SCIENTISTS.--Lectures and Essays,* By Professors Huxley, Barker, Stirling, Cope, Tyndall, Wallace, Roscoe, Huggins, Lockyer, Young, Mayer, and Reed. Being the University Series bound up. With a general introduction by Noah Porter, President of Yale College. 2 vols. 12mo, cloth, illustrated 2 50 *HAMERSLY, LEWIS B.--The Records of Living Officers of the U. S. Navy and Marine Corps.* Compiled from Official Sources. Third edition. Cloth, 8vo. 2 50 *HAMILTON, W. G.--Useful Information for Railway Men.* Sixth edition, revised and enlarged. 562 pages, pocket form. Morocco, gilt 2 00 *HARRISON, Col. WALTER.--Pickett's Men.* A Fragment of War History. With portrait of Gen. Pickett. 12mo, cloth 1 25 *HARRISON, W. B.--The Mechanic's Tool Book,* With Practical Rules and Suggestions for Use of Machinists, Iron-Workers, and others. Illustrated with 44 engravings. 12mo, cloth 1 50 *HARWOOD, A. A.--Naval Courts-Martial.* Law and Practice of United States Naval Courts-Martial. Adopted as a Text-Book at the U. S. Naval Academy. 8vo, law-sheep 3 00 *HASKINS, C. H.--The Galvanometer and its Uses.* A Manual for Electricians and Students. Second edition. 12mo, morocco 1 50 *HAUPT, Brig.-Gen. HERMAN.--Military Bridges.* For the Passage of Infantry, Artillery, and Baggage-Trains; with suggestions of many new expedients and constructions for crossing streams and chasms. Including also designs for Trestle and Truss Bridges for Military Railroads, adapted specially to the wants of the Service of the United States. Illustrated by 69 lithographic engravings. 8vo, cloth 6 50 *HEAD, Capt. GEORGE E.--A New System of Fortifications.* Illustrated. 4to, paper 50 *HEAVY ARTILLERY TACTICS: 1863.* Instructions for Heavy Artillery; prepared by a Board of Officers, for the use of the Army of the United States. With service of a gun mounted on an iron carriage, and 39 plates. 12mo, cloth 1 00