#68 



ON CRYOLITE*- 



pyrites, we may conjecture, that they do not occur in 

 open spaces as veins, where there is room for the 

 regular crystallisation, but rather in beds. A more 

 complete suite of specimens, or an examination of 

 the tract itself, where the cryolite occurs, will en- 

 able us to determine the accuracy of the conjecture 

 we have just stated, which has been deduced from 

 the examination of but few specimens, and possi- 

 bly these may not be very characteristic in a geo- 

 gnostic point of view. 



