Tissandier, Gaston, 1843-1899, Frith, Henry, 1840-, Harry Houdini Collection (Library of Congress) DLC · London, New York [etc.] Ward, Lock & Co · leaf 542
trations. The MR. EDTSON. 185 voice strikes against the diaphragm, and it begins tovibrate. The sound is not conveyed by the wire; themotion is communicated, and the vibrations becoine soundwaves again. The Telephone consists of a cyhndricalmagnet encircled at one end by a bobbin, on which iswound… … Mode of using the Telephone. the binding screws. In front of the magnet is a thincircular iron plate, in which is the mouthpiece. Thedrawings will explain the instrument. Mr. Edison also invented a Telephone like Grays, andmade the discovery, that when properly prepared, carbon■would change its…
Scientific recreations
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