E R I E S\ 31 
If the Particles of Matter have Sides and 
Angles, will they not touch in more Points, 
and form Bodies more folid and durable 
when joined together laterally, than when 
connected by their Angles ? And if the 
Surfaces of luch Bodies are fmooth and 
polifhed, .will not their Junction be much 
the firmer ? 
When one Salt is faid to be converted 
into another, or appears in the Figures of 
another, by the Addition of fomething 
thereto ; may it not be fuppofed, that by 
the Intervention of other fhaped Particles, 
the Particles of the firft Salt are prevented 
from cohering by the fame Sides and An¬ 
gles as they did before; and that 'by the 
Mixture of thefe Figures the new Forms 
are produced ?-—Some Solutions will mix 
and form, Cryftals and Configurations by 
Combination : in others, however blend-* 
ed, the Cryftals of each Kind appear al¬ 
ways feparate. 
Are not tranfparent Bodies compofed pro¬ 
bably of homogeneous Particles, or Parti¬ 
cles of the like Size and Figure, arrang¬ 
ed in fome uniform Direction, whereby 
their Interfaces being rendered regular, are 
fitly adapted for tranfmitting the Rays of 
Light ? And is not the Tranfparency of all 
faline Cryftals and Configurations moil likely 
to b®* owing to the fame Caufe ? 
•D.q 
