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The principles underlying radio communication (1922) United States. National Bureau of Standards, Ould, Richard Sheldon, 1889-, United States. Army. Signal Corps · Washington, Govt. Print. Off. · leaf 411
stems of communication requirethe separate consideration which has been given to them in thisbook. As has been stated in Section 156, in discussing theoperation of a spark gap, when a spark gap is operating nor- 406 TRANSMITTING APPARATUS. nially there is a bluish-white snap which is easily… … CurrentFig.ZZ&Current-Yokage ^Characteristic of the D CArc. TimeFig.ZZ4. Current andVoltage Waves of theOscillating JTrc. N © Carbon (a) Telegraph, Wireless · Radio
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