[ 3r ] 
ently probable, and under that impreffion I made the following 
experiment. 
Havine diffolved 1oo grs. of cryftallized mineral alkali in 
420 of water, I faturated this folution with vitriolic acid, whofe 
fpecific gravity was 1,5654, and for this purpofe 52 grs. were 
requifite, the lofs of air was 12 grs. and hence I inferred the 
quantity of pure alkali to be 15 grs. the fpecific gravity of the 
folution, temperature 65°, was 1,045, and its weight 860 grs.. 
The acid contained 61 per cent. ftandard.. 
I auso found the fpecific gravity of a folution of I0o grs.. 
cryftallized Glauber in 836 of water to be 1,045 in the fame 
I 
9,36 
falt, I inferred the former to contain the fame proportion, and 
temperature, and as this folution contained of its weight of 
confequently the quantity of falt to be aao79088 grs. but of 
b 
this quantity 15 only were alkali, and 31,72 ftandard acid, 
=46,72, therefore the remainder was the water taken in by 
eryftallizing =45,16 grs. 
From hence it fhould follow that roo grs. cryftallized Glau- 
ber falt contain 16,32 of alkali, 34,52 of ftandard acid, and 
49.15 of water of cryftallization, which nearly agrees with the 
determination of Mr. Bergman, for my ftandard is undoubtedly: 
weaker than what he calls his ftrongeft acid, and if we take 
7 grs. from the ftandard, and attribute them to the watery part, 
there will be but little difference. Yet I now believe this deter- 
mination 
