Elementary natural philosophy : designed for high schools and academies (1881)
Griffin, La Roy F. (La Roy Freese), 1844-1916 · Philadelphia : Sower, Potts & Co. · leaf 142
to show its various parts, the left shows the same instru-ment in its case ready for use. 478. The telephone acts as follows; the waves of soundmove the diaphragm back and forth. Each motion of thediaphragm causes a current of electricity to pass throughthe wire, and so moves the diaphragm of the… … *See Electricity, Section 03G. THE PHONOGKAPH. 133 479, The Photophone. The force which carries themovements of the sound and reproduces them at a distancein the telephone is electricity. The later instrument, thePhotophone, uses light for the same purpose. Waves ofsound set a diaphragm into…
Physics
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
