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MoRVEAU faturated 485 grains of cryftallized foda (= 104,66 

 of mere foda) with 545 grains of fpiritof nitre, whofefp. grav. ac 

 4° of Reaumur (=41'' of Fahrenheit) was 1,2247, which at 60° 

 of Fahren. would be 1,219, and this by my calculation contains 

 about 27,29 per cent, real acid; confequently 545 grains contained 

 148,73; then 100 grains mere foda fhould take up 142 of real 

 nitrous acid. 2d Old Mem. Dijon 184. 



Lavosier alfo faturated a given quantity of foda with nitrous 

 • acid, but as there was an excefs of acid no ftrefs can be laid on his 

 experiment. 



I found nitrated foda to attrad moifture in a moderate degree. 



Nitrated Barytes. 



As barytic earth cannot well be dilTolved in nitrous acid without 

 the afliftance of heat, I was obliged to attempt the analyfls of this 

 fait by indired methods, namely, precipitation by cryftallized 

 foda and vitriolated tartarin. 



The foda I employed contained 15 per cent, of fixed air, and 

 21,5 of mere alkali; and 100 grains of aerated barytes ignited 

 contains about 21,5 of fixed air. 



Now I found that ^100 grains of cry^allized nitrated barytes 

 were precipitated by 105 nearly of this^foda, and that the earth 



after 



