St. John, Thomas M. (Thomas Matthew), b. 1865 · New York, T. M. St. John · leaf 98
Fig. 125. Fig. 126. sound out again is called the receiver. Sound itself doesnot pass over the line. While the same apparatus can beused for both transmitter and receiver, they are generallydifferent in constru(5lion to get the best results. … Fig. 127. 120. The Bell or Magneto-transmitter generatesits own current, and is, stridtly speaking, a dynamo that 95 96 HOW THE TELEPHONE TRANSMITS SPEECH. is run by the voice. It depends upon indudtion for itsadtion. Fig. 125 shows a coil of wire, H, with soft iron core,tlie ends of the wires…
Electricity
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