File:Photomicrograph of annealed and quenched steel, from 1911 Britannica plates 11 and 14.jpg
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Photomicrograph_of_annealed_and_quenched_steel,_from_1911_Britannica_plates_11_and_14.jpg (284 × 274 pixels, file size: 27 KB, MIME type: image/jpeg)
Summary
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English: Photomicrographs of steel. The top photo shows annealed steel, while the bottom shows quenched steel. |
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= Encyclopædia Britannica Eleventh Edition Vol. 1, Plate between pp. 704 and 705, Fig. 14. Files retrieved from Wikipedia, here and here then combined into a split-picture. Photos are pre-1911 |
| Author | Osmond and Cartaud. |
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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This image might not be in the public domain outside of the United States; this especially applies in the countries and areas that do not apply the rule of the shorter term for US works, such as Canada, Mainland China (not Hong Kong or Macao), Germany, Mexico, and Switzerland. The creator and year of publication are essential information and must be provided. See Wikipedia:Public domain and Wikipedia:Copyrights for more details.
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File history
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 20:53, 3 January 2013 | | 284 × 274 (27 KB) | wikimediacommons>Zaereth~commonswiki | User created page with UploadWizard |
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