File:EB1911 Telegraph - Marconi magnetic detector.jpg
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EB1911_Telegraph_-_Marconi_magnetic_detector.jpg (370 × 319 pixels, file size: 22 KB, MIME type: image/jpeg)
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 17:09, 22 March 2016 | 370 × 319 (22 KB) | Library Guy | {{Information |Description ={{en|1=In 1902 Marconi invented two forms of magnetic detector, one of which he developed into an electric wave detector of extraordinary delicacy and utility (see ''Proc. Roy. Soc.'', 1902, 70, p. 341, or British Pat. Sp... |
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