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, 1882. | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Heritage Images / Oxford Science Archive |
Bildgröße: | 2607 px × 4015 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |