COMPOSITION OF BARYTIC SALTS. 303 



15(>*5 grs. of ignited muriate were decomposed in the 

 same manner, und afforded 146*75 grs. of carbonate, or Q377 

 per cent. 



Hence (averaging the results of the two experiments) 100 

 grs. of ignited muriate afford 03*38 of carbonate: and 100 

 grs., of carbonate coutain the same quantity of barytes as* 

 100*6 of ignited muriate. 



Sect. 4. Composition of Carbonate and Muriate of Darytes. 



*)3 grs. of carbonate, dried at nearly a red heat, lost 20*5 Composition of 

 grs. of carbonic acid by solution in muriatic acid; or 2-2*04 

 per cent. 



145*5 grs. of carbonate, by similar treatment, lost 31 grs. 

 of carbonic acid, or 21*3 per cent. 



Hence, on an average, carbonate of barytes consists of the carbonate, 



21*67 carbonic acid 

 78-33 barytes 



100. 



Ignited muriate of barytes consists of ignited muri* 



ate, 

 73*14 barytes 



26\s6 muriatic acid. 



100. 



And fully crystallized muriate contains crystallized 



!ai_ ,_ i muriate, 



02'47 barytes 



22*93 muriatic acid 



14*6 water 



100. 



Hence also, ICO of carbonated barytes contain the same 

 quantity of earth as J 24*9 of the crystallized muriate. 



Sect. 5. Composition of Sulphate of Barytes* 



100 grs. of ignited muriate of barytes were added by de- 

 grees to some very pure sulphuric acid in a platina crucible. 

 When the effervescence had subsided, the mixture was 

 gently heated, and the excess of acid was saturated by car- 

 bonate 



