Henry and Hora's modern electricity; a practical working encyclopedia (1915)
Henry, James. [from old catalog], Hora, Karel Jan, 1881- [from old catalog] joint author · Chicago, Laird & Lee, inc. · leaf 283
he resonator, elec-trical vibrations are also set up in the wire of the resonatorwhich create a current in the wire and small sparks passingover the gap O, of the resonator are visible. No sparks,however, will be observed when the two apparatus, the oscil-lator and the resonator are not in perfect…
Electrical engineering
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