Phonautograph n. (Physics) An instrument by means of which a sound can be made to produce a visible trace or record of itself. It consists essentially of a resonant vessel, usually of paraboloidal form, closed at one end by a flexible membrane. A stylus attached to some point of the membrane records the movements of the latter, as it vibrates, upon a moving cylinder or plate.
... Centripetal Force. Centrifugal Force. Capillary Attraction. The Sap of Trees. Sound. Acoustics. Sound Mediums. Vibration. Velocity of Sound. Sound Reflections. Resonance. Echos. Speaking Trumpet. The Stethoscope. The Vitascope. The Phonautograph. The Phonograph. Light. The Corpuscular Theory. Undulatory Theory. Luminous Bodies. Velocity of Light. Reflection. Refraction. Colors. The Spectroscope. ... — Practical Mechanics for Boys • J. S. Zerbe Read full book for free!
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