carnot's theory of the motive power of heat. 



563 



sumed temperature t. After the explanations of §§ 33, 34, 35, 36, it is only ne- 

 cessary to add that c is a quantity of which the value is very nearly unity, and 

 would be exactly so were the capacity of water for heat the same at every tem- 

 perature as it is between 0° and 1° ; and that the value of c (S— i), for any assigned 

 values of S and t, is found, by subtracting the number corresponding to t from 

 the number corresponding to s, in the column headed " Nombre cles imites de 

 chaleur ahandonnees par un kilogramme d'eau en descendant de T° « 0°", of the last 

 table (at the end of the Tenth Memoire) of Regnault's work. By giving S the 

 value 230°, and by substituting successively 220, 210, 200, &c., for t, values for 

 X, y, x, y', have been found, which are exhibited in the following Table : — 



