Picture No | 10215493 |
Date | 1878 |
Description | Phonograph |
Details |
Diagram engraving showing components of a phonograph, along with a woman demonstrating how it is used. The phonograph worked by a small needle vibrating along a jagged groove and transmitting these vibrations to an amplifier via a small magnetic field.
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Source | The Illustrated London News, 3 August 1878, page 109 |
Credit | © Illustrated London News Ltd/Mary Evans |
Restrictions |
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