W. A, Norton on Molecular Physics. of 241 
of the outer envelope, or the interstitial electric ether of bodies, 
asa wave-force.* 
We have seen that the attraction exerted by the atom upon 
its atmosphere, proper, by forcing outward a portion of the uni- 
versal ether near the surface of the atom, develops at the same 
time an effective molecular attractive force and what we have 
called the force of heat-repulsion, From the difference that ob- 
tains in the circumstances under which these forces and the above 
_ Gleetric ether 
_ At other points, as ¢ 
etd the attraction of either molecule alone. 
hore, that the two united molecules will be surrounded by an 
age ¢ atmosphere of their own, spherical or spheroidal in form, 
24 at the same time that 
M€ Mate 
Dor » $1Ze, and perh culiarities of the central atom, but also 
: Pom the amount of sll puede cag nl extraneous sources. External forces, of 
: ‘the value of i extension, applied to a body, also tend to augment or dimin 
ibs Tn treat _ sth gy 
thi ting briefly of solidification (p! 209, &e.), our attention was confined 
"send ‘a the union of dimple molecules i wad homogeneous mass, but there is good 
that of believe that in cases of solidification, with the exception, perhaps, of 
- ubine eect crystallization, compound molecules are first formed, and that these 
»10 various modes, to form the solid. In every such instance the formation 
i. 
