A Treatise on Coast Defence; based on the experience gained by Officers of the Corps of Engineers of the Army of the Confederate States, and compiled from Official Reports of Officers of the Navy of the United States, made during the North American War from 1861 to 1865, by Von Scheliha, Lieutenant-Colonel and Chief Engineer of the Department of the Gulf of Mexico, of the Army of the late Confederate States of America; _with numerous fine plates_, imperial 8vo, cloth, top edge gilt 15 0 =Trevithick.= The Life of Richard Trevithick (Inventor of the High-pressure Steam-engine), with an account of his Inventions, by Francis Trevithick, C.E., 2 vols., medium 8vo, cloth, _illustrated by a steel portrait, lithographs, and numerous beautiful wood engravings, including many accurate illustrations of Cornwall, its Mines, and Mining Machinery_, reduced to 12 6 =Turbine.= A Practical Treatise on the Construction of Horizontal and Vertical Waterwheels, _with 11 plates_, specially designed for the use of operative Mechanics, by William Cullen, Millwright and Engineer, second edition, revised and enlarged, small 4to, cloth 12 6 =Turning.= The Practice of Hand-turning in Wood, Ivory, Shell, etc., with Instructions for Turning such work in Metal as may be required in the Practice of Turning in Wood, Ivory, etc.; also an Appendix on Ornamental Turning, by Francis Campin, second edition, _with wood engravings_, crown 8vo, cloth (a book for beginners) 6 0 =Valve-Gears.= Treatise on Valve-Gears, with special consideration of the Link-Motions of Locomotive Engines, by Dr. Gustav Zeuner, third edition, revised and enlarged, translated from the German, with the special permission of the author, by Moritz Müller, _plates_, 8vo, cloth 12 6 =Ventilation.= Health and Comfort in House Building, or Ventilation with Warm Air by Self-acting Suction Powder, with Review of the mode of Calculating the Draught in Hot-air Flues, and with some actual Experiments, by J. Drysdale, M.D., and J. W. Hayward, M.D., second edition, with Supplement, demy 8vo, _with plates_, cloth 7 6 The Supplement separate 0 6 =Weight of Iron.= Tabulated Weights of Angle, T, Bulb, and Flat Iron, for the use of Naval Architects and Shipbuilders, by Charles H. Jordan, M.I.N.A., 18mo, sewed, second edition 1 6 =Wood-working Factories.= On the Arrangement, Care, and Operation of Wood-working Factories and Machinery, forming a complete Operators' Handbook, by J. Richards, Mechanical Engineer, _woodcuts_, crown 8vo, cloth 5 0 =Wood-working Machines.=