[111] “De la Nature de l’Air,” 1676.
[112] See Porter on the Steam-Engine Indicator for the best set of Regnault’s tables generally accessible.
[113] This uniformity is not seen where a substance is changing its physical state while developing its heat-energy, as occurs with steam doing work while expanding.
[114] “Théorie de la Machine à Vapeur,” par le Chevalier F. M. G. de Pambour, Paris, 1844.