ACCOUNT OF THE CRYOLITE OF GREENLAND. 401 



Under the supposition of the doubtless volcanic origin of the cryolite, and, 

 therefore, of the almost certain boundless depth of the- vein, there can never be 

 any fear of a lack of the mineral. The difficulties, chiefly with water, snow, and 

 ice, will doubtlessly increase as the mines deepen, but with proper steam power 

 and good engineering direction, these difficulties maybe overcome. Supposing that 

 the length and breadth of these different parts remain unchanged in descent, work- 

 ing the whole to a depth of forty feet under high-water mark, will give the follow- 

 ing result : 



A, whose medium level can be fixed at fourteen feet under high-water mark, 

 will give 16,380 tons clean cryolite. B, whose medium level is about two feet 

 under high-water mark, will give 30,760 tons of dirty cryolite. C, whose me- 

 dium level is about two feet over high-water mark, will give 113,400 tons me- 

 dium cryolite. Working the whole to a depth of forty feet under high-water 

 mark will, therefore, give about 160,000 tons cryolite of different qualities. 



In regard to the relations and matters concerning the cryolite mines which 

 are not mentioned here, I beg to refer to what I have formerly written from 

 Trigtout. 



Respectfully, PAUL QUALE. 



S6 s66 



