22 ANALYSIS OF LAZVLITE. 



Treated with B. The calcined mineral was easily ground, and did not 

 soda. 7 



scratch the agate mortar. One hundred grams were urged 



to a red heat with 400 of canstic soda: and after a pasty fu- 

 sion there remained a mass, which, diffused in water, afforded. 

 a turbid solution void of colour. This was supersaturated 

 with muriatic acid; evaporated and redissolved in boiling 



Silex precipi- water; when silex was precipitated from it, which weighed 

 ut . " 10 grains after calcination. 



C. The boiling liquor was precipitated by carbonate of soda. 

 tfo ulutineor F). The precipitate, containing neither glucine nor yttria, 



ytiria. vvas boiled in a lixivium of canstic soda, which effected a 



partial solution. The spongy, insoluble, brownish red resi- 

 duum was set apart. 

 Lixivium satu- ^. The soda lixivium (D) was supersaturated with muri- 

 ■ imted with nm- atic acid, and the boiling liquor precipitated by carbonate 

 ahlmine'seua- 1 °^ s0 ^ a ' ^he white precipitate, after sufficient elutriation, 

 rated. and being strongly calcined, left C6 grains of pure alumine. 



Lime. F. The reddish brown residuum (D) dissolved entirely in 



muriatic acid. The solution was concentrated, and the ex- 

 cess of muriatic acid saturated with ammonia. A little con-, 

 centrated sulphuric acid was then poured in, which threw 

 down a white precipitate. This was washed several times in 

 cold water, and calcined, after which (5 grains of sulphate of 

 lime, being equivalent to 2 grains of lime, remained. 

 Oxide of iron. Qf I nto tne liquor from which the lime had been precipi- 

 tated prussiate of potash was poured, and the precipitate 

 produced contained 2'5 grains of oxide of iron. 

 Magnesia. "• * ne U( l uor decanted from the prussiate of potash was 



mixed with carbonate of soda, and kept some time boiling, 

 A white substance fell down, which, after calcination, con-^ 

 sisted of 18 grains of magnesia. 

 Its component ^ne hundred grains of the calcined fossil therefore con- 

 paru. tained 



Silex 10 (B) 



Alumine C6 (E) 



Magnesia 18 (II) 



Lime- 2 (F) 



Oxide of Iron • • 2*5 (G.) 



Loss 1-5 



100 " 



The 



