542. Mr. keir on the Cryjl alii z at ions, See. 
between tlrefe two fubftances. No juft objection can be 
drawn againft this analogy from the magnitude of the 
former compared with the minutenefs of the latter : for 
the difference of fize between the fmall vitreous cryftals 
and the ftupendous bafaltic columns, which fupport 
mountains, iflands, and provinces, is no more than is 
proportionate to the difference ufually obferved between 
the little works of art and the magnificent operations of 
nature. 
x 
XXXV. Extra# 
