[ 234 ] 



graA'ities 1,2779 and 1,2687, ^^^ nearer to the former, and by 

 the folution of the ill problem will be found to denote 33,8 

 grains real acid; confequently 145 grains of this liquor contained 

 49 grains of real acid. The quantity of nitrated foda formed was 

 found by a ftandard experiment to be 85,142 grains, which is 

 very nearly the fum of the weights of the real acid and mere 

 alkali, as 36,05 + 49 = 85,05 ; this trifling diflference may be 

 water. 



Hence ioo parts deficcated nitrated foda fhould contain 57,57 

 real acid and 42,34 foda. 



Then ioo parts foda fhould take up 135,71 of real nitrous 

 acid. And ico parts nitrous acid fliould take up 73,43 of foda. 



Surprised at finding no water in this neutral fait, I lately 

 examined its compofition by my antient method. I dilTolved 200 

 grains of pure and well deficcated foda, and faturated the folu- 

 tion with 1225 grains of dilute nitrous acid, of which i confifted 

 of the concentrated acid 1.416, of which confequently 306,2 

 were employed ; the lofs of fixed air was 75 grains, and confe- 

 quently the quantity of real alkali was 125 grains. 



The fp. grav. 1,416 lie* between the tabular gravities 1,417 

 and 1,412, and by the folution of the ift; problem its centenary 

 quantity of acid will be found to be 53,53 j and 100 grains of 



this 



