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Application. 



As loo parts Cryftallized tartarin contain, as already faid, 4' of 

 vegetable alkali, 80 parts of it muft contain 32,8, but as 100 parts 

 of this alkali take 82,48 of real vitriolic acid, 32,8 fhould take 

 27,05, which is nearly the whole of what 100 parts of Epfom 

 contain. 



Experiment id. Fourcroy^ 2 An. Chy. 288. 



Crystallized foda, applied in the proportion of 108,8 to 

 roo of cryftallized Epfom, perfedly decompofed the E|)fom. 



Application. 



100 parts cryftallized foda contain, as already fhewn, 21,58 of 

 mere alkali, confequently 108,8 parts contain 23,479. Now 100 

 parts of this alkali take up 127,68 of real vitriolic acid ; there- 

 fore 23,479 Ihould take 29,97, which differs from the quantity 

 of acid I have afligned to log parts cryftallized Epfom only by 

 0,62 of a grain. 



Vol. VII. ' F f SeBion 



