File:Thomson-Houston arc-lighting dynamo 0228.jpg
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Thomson-Houston_arc-lighting_dynamo_0228.jpg (640 × 400 pixels, file size: 42 KB, MIME type: image/jpeg)
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current | 14:47, 10 November 2008 | 640 × 400 (42 KB) | Leydoig (talk | contribs) | Copyright held by Smithsonian |
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