File:Astigmatism.png
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Summary
Page explaining and illustrating w:astigmatism. Frederic Eugene Wright, The Methods of Petrographic-microscopic Research, Their Relative Accuracy and Range of Application, Carnegie institution of Washington, 1911 online
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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, 1931, 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 | 07:36, 12 November 2006 | | 550 × 750 (61 KB) | Dicklyon | Page explaining and illustrating astigmatism. Frederic Eugene Wright, ''The Methods of Petrographic-microscopic Research, Their Relative Accuracy and Range of Application'', Carnegie institution of Washington, 1911. |
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