Mr. S. Alfred Varley. He remarked that when lightning storms occur in the neighbourhood of telegraph wires, although the wires may not be actually struck, powerful currents are induced in them ...
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which should be able to transmit several times as many dispatches per hour over a telegraph wire as can be done by the Morse instrument. The theory upon which all the experimenters in this ...
Although in a vacuum electric current can be expected to travel at nearly the speed of light, telegraph wires, particular those placed underwater, suffer from a retardation of the signals sent ...