Thomas Alva Edison's first Phonograph (1878). In this model the cylinder on which the sound was recorded had to be rotated by hand. Instrument in recording mode. A horn was fitted to play back recording. From Theodore Eckardt "Physics in Pictures", London

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Photo credit: © Photo12/Ann Ronan Picture Library / Alamy / Afripics
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Keywords: 19th, century, cylinder, invention, music, recording, scheme, sound