File:Joule's Apparatus (Harper's Scan).png
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| Description |
English: Engraving of James Joule's apparatus for measuring the mechanical equivalent of heat, in which altitude potential energy from the weight on the right is converted into heat at the left, through stirring of water.
Français : Gravure représentant l’installation expérimentale utilisée par James Joule pour mesurer l’équivalence entre chaleur et travail. L’énergie potentilelle d’altitude du poids, à droite, est convertie en chaleur par agitation de l’eau à gauche. |
| Date | |
| Source | Harper's New Monthly Magazine, Vol. 39, No. 231, p. 327, August 1869. |
| Author | Jacob Abbott |
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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 | |
|---|---|---|---|---|---|
| current | 11:18, 18 October 2009 | | 1,684 × 1,387 (382 KB) | Ariadacapo (talk | contribs) | Cleaned up background and improved contrast. |
| 04:51, 5 January 2007 |  | 1,684 × 1,387 (1.2 MB) | Chowbok (talk | contribs) | {{Information |Description=Engraving of Joule's apparatus for measuring the mechanical equivalent of heat. |Source=''Harper's New Monthly Magazine'', No. 231, August, 1869. |Date=1869 |Author=unknown |Permission=public domain }}{{PD-US}} [[Category:Harper |
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