﻿110 MEIGS ON THE RELATION OF 



almost identical, or related to each other in a simple, multiple proportion. A still 

 more evident similarity prevails throughout the numbers indicating the atomic heats 

 of the same bodies. Furthermore, a remarkable relation, in some instances more 

 manifest than in others, is observed to exist between the atomic heat of a body and 

 its atomic volume. 



The first column of the table contains the names of the substances, or, when these 

 are compound, their formulae only ; the second, their atomic weights upon the hydro- 

 gen scale; the third, their specific gravities; the fourth, the observed specific heats, 

 with the initials of the Experimenters attached; the fifth, the mean specific heats; 

 the sixth, the atomic heats obtained, after the manner of Dulong and Petit, by multi- 

 plying together the atomic weight and the specific heat ; the seventh, the atomic 

 volumes, calculated according to the method of Schroeder and Kopp, by dividing the 

 atomic weight by the specific gravity. 



Av. denotes Avogadro; Dl., Dalton; D,M., De la Rive and Marcet; Hm., Hermann; 

 Nm., Neumann; P,D., Petit and Dulong; Pr., Potter; P,J., Playfaire and Joule ; 

 Rg., Regnault. 



The specific gravities adopted are generally the means of the observations made by 

 Kopp, Karsten, Brisson, Gay Lussac and Thenard, Mohr, Breithaupt and others, the 

 results of whose experiments are recorded in the more elaborate chemical works. 





