274 



Klaproth on the Chemical Analysis 



collected, edulcorated, and dried, weighed 49 grains, and con- 

 sisted of carbonate of lime. 



c. When the residuary liquor was boiled, it became turbid^ 

 and a white precipitate fell, the separation of which was com- 

 pleted by the addition of a little soda. Washed and dried, it 

 weighed 31 grains. Dissolved in sulphuric acid and evapo- 

 rated, it furnished crystals of sulphate of magnesia, which 

 being re-dissolved, left 4 grains of sulphate of lime, =2.5 grains 

 of carbonate of lime ; this being deducted, there remained 28.5 

 grains of carbonate of magnesia. 



100 parts, therefore, of this mineral consist of. 



Carbonate of lime C 6 49 ) 



c 2.50] 



Carbonate of magnesia . . 



51.50 



a 3.50 

 c 28.50 



Carbonate of iron i 



Carbonate of manganese 

 Water A 



32 



7.50 



2 



5 



98 



Anahjsis of Dolomite. 



[In these analyses, Klaproth dissolved the mineral in dilute 

 nitric acid, and saturated with caustic ammonia, which threw 

 down oxide of iron, when present ; he then added carbonate of 

 ammonia, by which carbonate of lime was precipitated ; and 

 lastly the magnesia was separated, either by boiling with car- 

 bonate of potassa ; or by oxalate of potassa. The following are 

 the results.] 



