W. A, Norton on Molecular Physics. 211 
tion of a square is that the properties of the molecules in refer- 
ence to cooling, (or, in general, in reference to the propagation 
contiguous molecules are, when in the ee state of crystal- 
lization, in the same physical condition. That a rectangle may 
be formed, a group of four particles must unite, but the escape 
of the sides of the rectangle must: determine a greater com- 
pression of the molecular atmospheres in this direction than in 
that of the other side. That the figure of a rhombus may 
for the first group of molecules, to acquire increased dimensions 
by successive solidifications of a series of figures similar to the 
lary molecular action may experience from the loss of heat, and 
nm 
. 
ther, tends to bring all 
of the line of the first 
