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Updated: July 5, 2026
In the experiments such as performed this evening, we operate the coil either from a specially constructed alternator capable of giving many thousands of reversals of current per second, or, by disruptively discharging a condenser through the primary, we set up a vibration in the secondary circuit of a frequency of many hundred thousand or millions per second, if we so desire; and in using either of these means we enter a field as yet unexplored.
By way of illustration, take for instance the most obvious phenomena, those of the discharge of the induction coil. Here is a coil which is operated by currents vibrating with extreme rapidity, obtained by disruptively discharging a Leyden jar.
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