File:PSM V63 D452 Marconi metallic filings kumascope.png
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PSM_V63_D452_Marconi_metallic_filings_kumascope.png (616 × 353 pixels, file size: 13 KB, MIME type: image/png)
PSM_V63_D452_Marconi_metallic_filings_kumascope.png (616 × 353 pixels, file size: 13 KB, MIME type: image/png)
DescriptionPSM V63 D452 Marconi metallic filings kumascope.png |
English: Marconi metallic filings kumascope (coherer) |
Date | |
Source | Popular Science Monthly Volume 63 |
Author | Unknown authorUnknown author |
Public domainPublic domainfalsefalse |
This media file is in the public domain in the United States. This applies to U.S. works where the copyright has expired, often because its first publication occurred prior to January 1, 1929, and if not then due to lack of notice or renewal. See this page for further explanation.
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current | 18:33, 11 September 2011 | 616 × 353 (13 KB) | Ineuw (talk | contribs) |
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