Amateur radio : how and why of wireless with complete instructions on operation of receiving outfits (1922)
Grainger, Maurice J · New York : James A. McCann · leaf 30
ther, so to speak, and cause a vi-bration, or strain, to be set up in the etherwhenever a movement of electricity takesplace. (See Fig. 2.) The smallest ether disturbance, even thatcaused by the flow of current when ringing abell, sets up ether waves which travel an un-known distance. The real… … «HMMO Hook-up of Simplest Type of Transmitting Set,
Radio · Amateur radio stations
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