94 G. Hagemann on minerals with Cryolite in Greenland. 
separated from the insoluble silicates, alumina and silica were 
separated by carbonate of ammonia, and fluorid of calcium with 
rbonate of lime were thrown down with chlorid of calcium; 
this precipitate was dried and ignited, and the carbonate of 
lime was removed by acetic acid. The silica was imperfectly 
determined, as I had not the means at my disposal to estimate 
it accurately. I treated the pulverized mineral with solution of 
soda and carbonate of soda, filtered, and decomposed the solu- 
tion by chlorhydric acid; evaporating to dryness thus render- 
ing the silica insoluble. Analysis gave, 
Equivalents. 
Fluorine, - artes oat: BOOS ; 
Aluminum, - : 14°27 1°05 
Sodium, - nee - T15 0°311 } 1.996 
Calcium, - - 14°51 0°725 f 
Water, - . seat SPI0 1:07 
Silica, ‘ ‘ 2° 0-135 
97°71 
 , caused by minute crystals of iron-pyrites), Hardness, 
e 
water. Analysis gave, 
Fluorine, -— - 51°03 2°68 2 
Aluminum, - 767 1:307 1 
ium, - - 23°00 * : 
Calcium, : - 701 0-35 Liss ts 
oisture, - - 0°57 
Insoluble, - - 0-74 
100°22 
are found associated with cryolite in the vicinity of Ivyiktant near 
Arksut-fiord, in South Greenland. 
Natrona, Pa., May, 1866. 
same as cryolite. Fuses at a red heat without giving off 
