Signalling through space without wires : being a description of the work of Hertz & his successors . 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 milliamperesthough 20 to 50 yielded good results. Unable to furnish any reason why the electric rad
Signalling through space without wires : being a description of the work of Hertz & his successors . 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 milliamperesthough 20 to 50 yielded good results. Unable to furnish any reason why the electric radiation ofa distant spark should reduce the resistance of pulverisedcarbon I refrained from publishing the bare observation in thehopes of finding an explanation by further experimentation,merely noting to friends the delicacy of the pulverised carbonrheostat as a detector of Hertzian waves and making some DR. MORTONS EXPERIMENTS. 113 further experiments with it and a telephone receiver in circuitin this direction. The recent publication of the brilliant researches of J. Lodge now makes the entire matter clear. describes a new form of microphonic detector ofHertzian waves, consist
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Keywords: ., bookcentury1900, bookdecade1900, bookidsi, booksubjectelectricity
