Mechanical appliances, mechanical movements and novelties of construction; a complete work and a continuation, as a second volume, of the author's book entitled "Mechanical movements, powers and devices" ... including an explanatory chapter on the leading conceptions of perpetual motion existing during the past three centuries (1914)
Hiscox, Gardner Dexter, 1822?-1908 · New York, N. W. Henley Publishing · leaf 183
i8o ELECTRIC POWER AND DEVICES. … 434. WIR P: L E S S TELEGRAPHY. Marconi coherer. Themost important part of the receiver is the coherer, which consists of a small glass tube about two and a half milHmeters ininternal diameter and some four centimeters in length.Two silver pole pieces are lightly fitted into this tube,separated by…
Mechanical movements
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