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 42
was a distant thunderstorm, or whether it wasonly picking up telegraphic jerks, I do not know. The jerkof turning on or off an extra Swan lamp can affect it whensensitive. I hope to try for long-wave radiation from theBun, filtering out the ordinary well-known waves by a black-board or other… … Fig. 19b.—A Portable Detector, B the Collecting Wire. light liable to frequent weak and occasionally violent excursions,and I could not trace any of these to the influence of the sun.There were evidently too many terrestrial sources of disturb-ance in a city like Liverpool to make the experiment…
Electric waves · Telegraph, Wireless · Electricity · Wireless Technology
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