File:Cooke and Wheatstone electric telegraph.jpg
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Cooke_and_Wheatstone_electric_telegraph.jpg (475 × 599 pixels, file size: 59 KB, MIME type: image/jpeg)
Photo courtesy Wikimedia user Geni
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 19:12, 14 July 2010 | | 475 × 599 (59 KB) | Kwiggins (talk | contribs) |
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