[ 2 ] 
In this experiment as in the former the quantity of pure 
alkali was 86 grs. the quantity of ftandard 104 grs. the fum of 
both r1g0 grs. yet the quantity of nitre was only 186,32 ers. 
Hence 3,68 are rejected as mere water; and if 104 ftandard 
lofe 3,68, 100 parts ftandard fhould lofe about 3,5; and hence 
the acid that enters into nitre is ftronger than ftandard in the 
proportion of 103,5 to 100 nearly, or 100 parts of this acid are 
equivalent to 103,5 of ftandard nearly. And therefore, 
First. 1oograins pure vegetable alkali faturated with nitrous 
acid fhould afford about 216 of nitre, and take up about 116 of 
the ftrongeft nitrous acid, equivalent to 120 of the nitrous 
ftandard. 
SECONDLY. 100 parts cryftallized nitre contain 46,15 of al- 
kali, and 53,85 of acid ftronger than ftandard in the proportion 
above-mentioned. 
HAVING evaporated the faturated folution, and expofed it toa 
heat of. 360°, I found the refiduum to weigh no more than 
179 grs. fo that 7 grs. were loft. Indeed the ancient method is 
in no cafe more defective than when applied to nitre, for during 
evaporation part of it is carried off, as WALLeRTIvs long ago re- 
marked, and when expofed to a red heat part of the acid is 
loft, and hence the great difference of the refults heretofore~ob- 
tained. As to water of cryftallization we may be affured that 
it contains none. Mr. Storr, who attended particularly to this 
object, found that it retains its cryftalline form, and only be- 
comes turbid in a heat of 590°. He thinks, indeed, it lofes 
fome 
