MINERAL from GREENLAND. 395 



Mr Allan fent a fpecimen of this mineral to Mr Eke- 

 berg, who analifed it in the courfe of laft fummer. The con- 

 ftituents which he obtained, as he ftates them in a letter to Mr 

 Allan, are as follows : 



Silica, - 36. 



Alumina, - - - 32. 



Soda, - 25. 



Muriatic acid, - - 6.75 



Oxide of iron, - - 0.25 



100.00 



This refult does not differ much from mine. The quantity 

 of muriatic acid is much greater than mine. The lime and the 

 volatile matter which I obtained, efcaped his notice altogether. 

 If we were to add them to the alumina, it would make the two 

 analyfes almoft the fame. No mineral has hitherto been found 

 containing nearly fo much soda as this. Hence the reafon of 

 the name by which I have diftinguifhed it. 



3 d 2 xm-. 



