[ ^3^ ] 



Bergman, Vol. I. p. 20, allows to 100 parts foda very nearly 

 the fame quantity of real nitrous acid as I do, namely, 135,5 

 parts. 



Having re-diflblved the above 308 grains and expofed the fo- 

 lution to fpontaneous evaporation, I found the cryftals dried at 70" 

 to weigh 3 1 7 grains ; hence this fait contains 2,8 per cent, of 

 water of cryftallization, but in a ftrong heat it would lofe much 

 more. 



Though Wenzel's determinations feemingly differ confiderably 

 from the foregoing, yet on a clofer infpecn:ion the difference will 

 be found not greater than the ufual imperfedion of weights and 

 weighing, and the varying nature of the acid may admit. 



He found 71,5 grains mere foda faturated with nitrous acid to 

 afford 190,75 of thoroughly deficcated nitrated foda, and hence 

 concluded that it contained no water, and confequently 190,75 

 grains of this fait to contain 71,75 of alkali and 119,25 of real 

 acid. 



Hence \co grains of this fait fhould contain 37,48 of alkali 



and 62,52 of acid; it is plain then that this acid contained the 



6,21 grains of water which I found in too parts of this fait, for 



if we add 6,21 to the quantity of acid I afcribe to 100 parts of 



this fait, we fhall find very nearly Wenzel's weight of acid, for 



53,21 +6,21 = 59,+2. 



According 



