[ 23° 1 



CHAP. III. 



OF NITRO NEUTRAL SALTS. 



Se8ion \Jl. 



Of Nitre. 



From the different refults of various experiments, I am led to 

 think that loo parts of cryftallized, but dry nitre, contain 51,8 

 parts mere alkali, 44 of acid and 4 of water of compofition. 



Hence 100 parts tartarin take up 84,96 of real acid with 8,1 of 

 water, and would afford 193 + of dry nitre. 



And 100 grains real nitrous acid take up 117,7 °f tartarin, and 

 would afford 227,24 of nitre, by reafon of 9,54 of water of compo- 

 fition, which in this cafe accompanies the acid. 



This is the befl account I am at prefent enabled to give of nitre, 

 the invefligation of the proportion of the acid contained in fp. of 

 nitre, being attended with peculiar difEculties, as much as the 

 acid efcapcs, when, in its concentrated ftate, water is added to it, 

 and fo much the more as it is more highly mephitized and the 



temperature 



