File:Cooke and Wheatstone electric telegraph.jpg
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 21:54, 5 January 2017 | | 2,420 × 3,052 (2.15 MB) | 127.0.0.1 (talk) | William Fothergill Cooke and Charles Wheatstone's electric telegraph ("needle telegraph") from 1837 now in the London Science Museam |
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