Image: Joule's Apparatus (Harper's Scan)
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Description: 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.
Title: Joule's Apparatus (Harper's Scan)
Credit: Harper's New Monthly Magazine, No. 231, August, 1869.
Author: Unknown
Usage Terms: Public domain
License: Public domain
Attribution Required?: No
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