File:PSM V84 D433 Thermograph chart.jpg
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| Description | Thermograph chart ruled for integration in terms of rate of growth. The areas of separate figures are to be determined by a planimeter and multiplied by the factor expressing the rate of growth prevalent during the period covered by the figures. Record from Coastal Laboratory, June 16-23, 1913. | |||
| Date | ||||
| Source | D. T. MacDougal: The measurement of environic factors and their biologic effects. The Popular science monthly, Volume 84, p429. New York, Popular Science Pub. Co., May 1914. Online: archive.org. | |||
| Author | D. T. MacDougal | |||
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This work is in the public domain in the United States because it was published (or registered with the U.S. Copyright Office) before January 1, 1929.
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
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| current | 15:59, 15 January 2014 | | 1,625 × 717 (365 KB) | Ineuw (talk | contribs) | Cleaned image |
| 23:36, 14 March 2011 |  | 1,720 × 782 (472 KB) | Martin H. (talk | contribs) |
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