438 TU DYNAMICAL 111 !* OF THE MOLECULAR CONSTITUTION OF BODIES. 



in it will tend to equality of temperature, and the aether will be subject 

 to the ordinary gaseous laws as to pressure and temperature. 



Among other properties of a gas, it will have that established by Dulong 

 and Petit, BO that the capacity for heat of unit of volume of the aether 

 muxt be equal to that of unit of volume of any ordinary gas at the same 

 It* presence, therefore, could not fail to be detected in our experi- 

 oo specific heat, and we may therefore assert that the constitution of 

 the a-ther is not molecular. 



