HEWSON, WM.—Principles and Practice of Embanking Lands from River Floods, as applied to the Levees of the Mississippi.
8vo, cloth 2 00
HOLLEY, ALEXANDER L.—A Treatise on Ordnance and Armor.
Embracing descriptions, discussions, and professional opinions concerning the materials, fabrication, requirements, capabilities, and endurance of European and American Guns, for Naval, Sea-Coast, and Iron-Clad Warfare, and their Rifling, Projectiles, and Breech-Loading; also, results of experiments against armor, from official records, with an appendix referring to Gun-Cotton, Hooped Guns, etc., etc. 948 pages, 493 engravings, and 147 Tables of Results, etc. 8vo, half roan 7 50
Half Russia 10 00
—— Railway Practice.
American and European Railway Practice in the economical Generation of Steam, including the Materials and Construction of Coal-burning Boilers, Combustion, the Variable Blast, Vaporization, Circulation, Superheating, Supplying and Heating Feed-water, etc., and the Adaptation of Wood and Coke-burning Engines to Coal-burning; and in Permanent Way, including Road-bed, Sleepers, Rails, Joint-fastenings, Street Railways, etc., etc. With 77 lithographed plates. Folio, cloth 12 00
HOTCHKISS, JED., and ALLAN, WILLIAM.—The Battle-Fields of Virginia.
Chancellorsville, embracing the Operations of the Army of Northern Virginia, from the First Battle of Fredericksburg to the Death of Lt.-Gen. T. J. Jackson. Illustrated with five maps and portrait of Stonewall Jackson. 8vo, cloth 3 50
HOWARD, C. R.—Earthwork Mensuration on the Basis of the Prismoidal Formulæ.