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 45
protrudes, it at once becomesslightly sensitive again ; and if a mere single wire protrudesthrough the box, not connected to anything at either end,provided it is insulated where it passes through, the waveswill utilise it as a speaking tube, and run blithely in. Andthis happens whether the wire be… … Fig. 20.—Spherical Radiator for emitting a Horizontal Beam, arrangedinside a Copper Hat, fixed against the outside of a metal-lined Box, whichcontains induction coil and battery and key. One-eighth natural size.The wires pass into the box through glass tubes not shown. necting the two must be…
Electric waves · Telegraph, Wireless · Electricity · Wireless Technology
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