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3. On the Mechanical Action of Heat
Published online by Cambridge University Press: 16 March 2015
Extract
In investigating the phenomena of the free expansion of gases in the previous part of this paper, they had been considered as expanding, without receiving or giving out energy in any form; so that the equation taken to represent their condition was
This condition was realized in the early experiments of Mr Joule, where, by the sudden opening of a stopcock, air previously confined in one vessel was allowed to fill another also; but it is not exactly realized in the experiments now in progress by Messrs Joule and Thomson, for which the correct equation is
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