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Summary
An early sketch of a Verneuil torch, used by Verneuil for the production of rubies using the Verneuil process. Taken from "Synthesis of Precious Stones" by I.H. Levin, first published in May 24, 1912. Available online at [1].
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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, 1930, 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 | 23:19, 16 February 2006 | | 1,368 × 1,959 (141 KB) | Aramgutang~commonswiki | An early sketch of a Verneuil torch, used by Verneuil for the production of rubies using the Verneuil process. Taken from "Synthesis of Precious Stones" by I.H. Levin, first published in May 24, 1912. Available online at |
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