Telegraphy.
Journal of the Society of Telegraph Engineers, including original Communications on Telegraphy and Electrical Science, edited by Major Frank Bolton and G. E. Preece, Parts I. to XII., demy 8vo, sewed, with wood engravings, each
5 0
To be continued quarterly.
Torpedo Warfare.
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