a New Mineral Species. 319 



state ; but the action did not appear sufficiently perfect for 

 the purpose of analysis. 



2.365 grains of the mineral (the whole quantity in my pos- 

 session) were heated to redness, and lost 0.315 of a grain, or 

 13.319 per cent, of water of crystallization. 



The residual 2.05 grains, which crumbled easily into pow- 

 der, were mixed with six grains of carbonate of soda, and kept 

 at a red heat during half an hour. The ignited mass was 

 quite white, and had not fused. Dilute muriatic acid dissolved 

 the whole of it, except a few flocculi of silica. The solution 

 was brought to dryness, and the silica, after being collected on 

 a filtre and heated to redness, weighed 0.89 of a grain, which 

 is 35.09 per cent. 



The solution, thus freed from silica, was treated with a 

 slight excess of carbonate of soda at a boiling temperature, 

 when a white precipitate subsided. It was digested in pure 

 potash, to dissolve any alumina that might be present, and the 

 alkaline solution, when boiled with an excess of muriate of 

 ammonia, yielded a portion of alumina, which, after exposure 

 to a white heat, weighed 0.655 of a grain, being 27.69 per 

 cent. 



The matter which did not dissolve in potash proved to be 

 an earthy carbonate ; for it dissolved with effervescence in mu- 

 riatic acid. On neuti-alizing the solution exactly, and adding 

 oxalate of ammonia, a white precipitate subsided, which yield- 

 ed 0.3 of a grain, 12.68 per cent, of pure lime. 



To the solution, after the separation of lime, carbonate of 

 ammonia and phosphate of soda were added. No precipitate 

 formed, and hence no magnesia was present. Iron and man- 

 ganese were likewise absent. 



The Edingtonite hence contains, 



88.78 



As the various substances found to exist in this mineral do 

 not account for the quantity submitted to analysis, it doubt- 



