W. A. Norton on Molecular Physics. 173 
As for the examples, by which he illustrates the theory, they 
consist of a series of phenomena of different kinds, the explanation 
must be remarked, that those explanations do not imply the exist- 
ence of extended atoms or of two distinct stherial substances; 
and therefore the theory assumes more than is necessary for, or 
guaranteed by, the explanation of phenomena. 
When he has shown this to be true of even the ordinary 
calorific and electric phenomena, we will admit that his ob- 
Jéction toa second ethereal atmosphere interpenetrating the 
t, may have some force. He has given no hint of the gen- 
manner in which he supposes electric phenomena to be 
evolved. Heat he conceives to originate in the vibrations ot 
the molecules of bodies ; but, it can be proved almost to 2 
demonstration, that heat cannot originate in this manner. 
Our author proceeds as follows : 
— atoms of gross matter being “indivisible” cannot be ex- 
seed, and cannot be conceived to be “spherical in form, for 
. M they were extended and indivisible they would be so many 
ti Sycontinnons matter, which we have already proved to be 
