Picture No | 10294030 |
Date | 1861 |
Description | The Reis Telephone system |
Details |
The Reis Telephone System (developed by Johann Philipp Reis, 1834 - 1874), demonstrated to the Physical Society in Frankfurt in 1861. Reis' speaker worked by magnetostriction.
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Source | Unattributed engraving |
Credit | Mary Evans Picture Library |
Restrictions |
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