| 
5 
W. A. Norton on Molecular Physics. 78 
different mechanical properties of different substances may be 
ascribed, primarily, to differences in the value of the ratio of the 
constants of electric attraction and repulsion C, in Table I); 
and to a certain extent also to differences in the size of the mo- 
lecular atmospheres, upon which the value of & in Table I. partly 
depends. In consequence of these supposed differences in the 
.value of the ratio, —-, each substance should have its own special 
m 
curve of molecular action. It is natural to suppose that the 
constant, n, of the force of attraction exerted by the atom upon 
Wholly or partially depend, the fact that the mechanical condi- 
tion of rangnd rane Ger ‘molecales is not fixed and unchangeable, 
aa 
—Srconp Serres, Vor. XXXVIII, No. 112.—Juxy, 1864, 
10 
