... steam-engines can also be regarded as a means of destroying the equilibrium of the caloric. To be convinced of this we need to observe closely the manner in which motive power is developed by the action of heat on vapor of water. Imagine two bodies...
Reflections on the Motive Power of Heat and on Machines Fitted to Develop ... - Page 52
by Sadi Carnot, Hippolyte Carnot, William Thomson Baron Kelvin - 1890 - 260 pages
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