Image:Marconi magnetic.jpg
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[edit] Summary
From the book "A Handbook of Wireless Telegraphy" (1913) by J. Erskine-Murray. D.Sc.
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This image is in the public domain in the United States. In most cases, this means that it was first published prior to January 1, 1923 (see the template documentation for more cases). Other jurisdictions may have other rules, and this image might not be in the public domain outside the United States. See Wikipedia:Public domain and Wikipedia:Copyrights for more details. |  |
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| Date/Time | Dimensions | User | Comment | |
|---|---|---|---|---|
| current | 03:08, 23 March 2006 | 482×392 (27 KB) | DV8 2XL (Talk | contribs) | (From the book "A Handbook of Wireless Telegraphy" (1913) by J. Erskine-Murray. D.Sc.) |
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