146 : Scientific Intelligence. 
M. Grad ascribes to the freezing of the infiltrated water in the 
capillary fissures, not only the enlargement, but also the “ crys- 
tallographic orientation” of glacier-ice, discovered by Bertin, and 
by MI 
crystalline structure; amorphous glass can yield the same phenom- 
enon through strains forced upon it by external pressure. It 
sophical Magazine Sir John Herschel conjectured a parallel pier 
ment of the optic axes, but not on grounds corresponding with M. 
en sufficiently considered in the calculation. One of these ree 
inary britt 
