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 128
Ann. XXXVII., p. 443), tending to show that theeffect is due to a disintegrating or evaporative effect of lighton surfaces. Elster and Geitel had observed that thedischarging power of glowing bodies was diminished byapplication of a magnetic field, the effect being the same as ifthe temperature was… … ,To Electroscope.Fm. 60.Explanation of Fig. 60.—The sodium and mercury are introducedthrough the tube S into the globe K. The tube S is then closed, a pumpapplied to X, and exhaustion carried on for some days. T is an openfunnel sealed into the tube (as is done in some vacuum tubes made byHoltz) to…
Electric waves · Telegraph, Wireless · Electricity · Wireless Technology
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