MOTOGRAPH
\mˈɒtəɡɹˌaf], \mˈɒtəɡɹˌaf], \m_ˈɒ_t_ə_ɡ_ɹ_ˌa_f]\
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A device utilized in the making of a loud-speaking telephone, depending on the fact that the friction between a metallic point and a moving cylinder of moistened chalk, or a moving slip of paper, on which it rests is diminished by the passage of a current between the point and the moving surface.
By Oddity Software
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A device utilized in the making of a loud-speaking telephone, depending on the fact that the friction between a metallic point and a moving cylinder of moistened chalk, or a moving slip of paper, on which it rests is diminished by the passage of a current between the point and the moving surface.
By Noah Webster.
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m[=o]'to-graf, n. a device of Edison's, used as a telephone receiver, &c., by which the variation of the friction between two conductors in relative motion is diminished periodically by the passage of a current of electricity from one to the other across the surface of contact.--adj. MOTOGRAPH'IC. [L. motus, motion, Gr. graphein, to write.]
By Thomas Davidson
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