Tissandier, Gaston, 1843-1899, Frith, Henry, 1840-, Harry Houdini Collection (Library of Congress) DLC · London, New York [etc.] Ward, Lock & Co · leaf 547
instrument which in its main features consists of a carbon pencil, so suspended that one end rests upon a carbon die. The instrument being connected with a Telephoneby the circuit wires, will reproduce faint sounds verydistinctly. Once a Microphone was put into a preacherspulpit, and joined to a… … * Scribners Magazine,
Scientific recreations
Internet Archive · Cornell University Library · Public Domain Mark 1.0. Free to use for anything.
