Signalling through space without wires : being a description of the work of Hertz & his successors (1900)
Lodge, Oliver, Sir, 1851-1940, Hertz, Heinrich, 1857-1894 · London : "The Electrician" Printing and Publishing Company, Limited · leaf 121
8TATIO INFLUENCE MACHINE / MILL1AMPERE METER 5jj* PULVERIZED ™ CARBON RHEOSTAT TELEPHONE RETURN CIRCUIT … GROUND Fig. 58. the loudest, both needle jump and click, dying away graduallyat each successive spark until they ceased at from thetwentieth to thirtieth. To turn the rheostat off and then onagain rendered the experiment repeatable. The reading ofthe meter, best adapted to success, was about 5…
Electric waves · Telegraph, Wireless · Electricity · Wireless Technology
Internet Archive · Medical Heritage Library · Public Domain Mark 1.0. Free to use for anything.
