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| Picture No | 10051896 |
| Date | 1880 |
| Description | Topophone Life Save |
| Details |
TOPOPHONE Device which, by amplifying sound, helps sailors to avoid collisions at sea, particularly during fog or at night
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| Source | engraving by unnamed artist in 'Ilustracion Espanola y Americana' 30 November 1880 page 328 |
| Credit | Mary Evans Picture Library |
| Restrictions |
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