Spon, Ernest, Haldane, Robert, Lock, Charles G. Warnford (Charles George Warnford), 1853-1909 · London ; New York : E. & F.N. Spon · leaf 218
n through telephone to induction- magnetic one. In coupling the instru- coil, whence it started. The microphone ment, the I of one is connected with the bell and switch are best combined in c of the othei". The transmitter swings on 2 small brackets inside the front, one instrument. (Frank.) ■ (e)… … To call the distant station, press the are laid on, they will be the right dis- tance from magnet, and may be screwed button a, which breaks contact at 6, and puts the line I and carbon of bat- up. Instruments switched in thisman- ner are as loud as any made ; but they tery c in contact at d. The…
Workshop recipes · Technology · Industrial arts
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
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