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From a folution of vitriolated vol-alkali, precipitated by a folu- 

 tion of muriated barytas, 164 grains of ignited barofelenite were 

 obtained, hence the fait contained 54,66 grains real vitriolic 

 acid. 



Hence 100 grains vitriolated vol-alkali contain 14,24 of mere 

 vol-alkali, 54,66 of real acid, and 31,1 of w^ter. 



In my former paper I ftated the quantity of vitriolic acid in 100 

 grains of cryflallized vitriolated vol-alkali to be 62,47 ^andard, 

 = 55,7 real acid, the variation is not confiderable, but of the al- 

 kali I could not then form a proper eflimate. 



Hence 100 parts mere vol-alkali take up 383,8 of real vitriolic 

 acid, and afford 702,24 of vitriolated volalkali. 



2dly, 100 parts real vitriolic acid fhould take up 26,05 of mere 

 vol-alkali, and afford 182,94 of vitriolated vol-alkali. 



According to Wenzel, alfo, 100 parts vitriolic ammoniac con- 

 tain 58,8 of real acid, hence of all cryftallized falts it contains the 

 greateft proportion of this acid, as Glauber does the leaft. 



Nitrated Vol-Alkali. 



From 50 grains of cryftallized nitrated vol-alkali, mixed with 

 twice its weight of flacked lime, I obtained, in a pneumatic ap- 

 paratus, 40 cubic inches of alkaline air. Bar. 30,06, Therm. 61°, 



by 



