File:PSM V74 D233 Thorium radioactive incandescent gas mantle placed above plant seeds.png
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Summary
| Description |
English: Thorium radioactive incandescent gas mantle placed above plant seeds |
| Date | |
| Source | Popular Science Monthly Volume 74 (January to June 1909), Page 229, Fig. 8. |
| Author | Unknown author |
Experiment on the effect of radiation (from unburned thorium gas mantle) on the germination and growth of timothy grass seed.
Licensing
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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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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 02:44, 11 March 2012 | | 1,831 × 1,237 (628 KB) | Ineuw |
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