446 W. A. Norton—Molecular and Cosmical Physies. 
quence (p. 442), the ratio ~ will decrease, the curve of molec- 
ular action (fig. 4) become depressed, and the distances Oa and 
Obincrease. The effective attraction between the molecules that 
uts itself in equilibrium with the stretching force, as this 
increases, must then obtain ata distance that augments wi 
Oa, as well as in the ordinary way. Its moderate tenacity also 
assigns to it acomparatively low value of the ratio = 
ents by Prof. E. Villari, published in the Philosophical Maga- 
m : 
zine (Feb., 1872). He finds that while india-rubber gives out ~ 
(p. 442) also appears to be the originating cause of erystaliza, 
tion and solidification in general, chemical combinations, a? 
in the light of this general conception, how chemical a % 
may spring up. ‘T'wo primitive molecules of different pens 
stances, when brought into contiguity, will at first come UN” 
the operation of their mutual exterior repulson (Pp. 339), ane 
is plam that unless this repulsive action be in some way 
an attractive one, no union of the two molecules can ™ 
ot eee 
a 
if 
