228 



ANALYSIS OF SOME AEROLITES. 



The liquor 

 p ecijiitattd, 



aad the preci- 



jutftte treated 

 *^ith sulphuric 

 ■*oid. 



The solution 

 evaporated and 

 r-dbsolved. 



Component 

 partf of the 

 stone. 



precipitated by succinate of iron, and the precipitate heated 

 redhct: then, after arklingthe oxide of iron obtaiatd in ex- 

 periment 6, and dropping on it a little oil, i( was heated 

 redhot in a close vessel. The oxidulaied iron in this state 

 weighed 80 grs, answering to 58 of metallic iron. 



/». The liquor separated from the iron was precipitated 

 by carbonate of potash while boiling. A greenish white 

 precipitate of carbonate of magnesia was obtained, which 

 was added to the carbonate of magnesia of experiment 

 e, and exposed to a strong red heat. This changed 

 the colour reddish, and the magnesia weighed 48 grs. 

 Being treated with sulphuric acid diluted with water, half 

 a grain of oxide of manganese was separated from it. 



i. The sulphuric solution was evaporated to dryness, and 

 the salt redissolved in a great deal of water. Some silex 

 separated, which, after calcination, weighed 2.5 gri. On 

 evaporating the solution, small acicular crystals were ob- 

 tained, which were sulphate of lime, and weighed 3 grains, 

 equivalent to one grain of lime. 



k. The remainder of the solution afforded nothing but 

 sulphate of magnesia, the quantity of base in which was 

 only 44 grains, when the weight of the silex, lime, and ox- 

 ide of manganese was deducted. The colour of the sul- 

 phate of magnesia still tending to green, the presence of a 

 little nickel was to be presumed. Accordingly the salt was 

 redissolved in water, and the nickel precipitated by a stream 

 of sulphuretted hidrogen. The oxide thus obtained was 

 mixed with that of experiment 5, and exposed to a strong 

 red heat; after which it weighed I '5 gr., answering to 1 

 gr. of nickel. 



From the results of this analysis it appears, that 100 parts 

 of the aerolite of Lisst: gave 



Iron g 



Nickel k 



Manganese ........ h 



CM y c? 41.75 7 



^''^'^ •; "•[ i i-ssj 



Magnesia k 



Aluniine« ••• f 



Lime •• i 



Sulphur and loss .. •••••• »•.«»••••••••• 



I have 



