File:EB1911 Telegraph - Morse's Conduction Method.jpg
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EB1911_Telegraph_-_Morse's_Conduction_Method.jpg (352 × 293 pixels, file size: 15 KB, MIME type: image/jpeg)
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 18:32, 8 March 2016 | 352 × 293 (15 KB) | Library Guy | {{Information |Description ={{en|1=A circuit for wireless telegraphy: Morse showed, by experiments made in 1842 on a canal at Washington, that it was possible to interrupt the metallic electric circuit in two places and yet retain power of electric... |
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