a ae 
that Ee of its weight was falt. The whole weight was go4 
9025 
grs. then Bgag = 15245 the quantity of falt, the quantity 
of pure alkali was 50,08—18=32,05, that of ftandard acid was 
45,75, the fum of both was 77,83, and the remainder 54,62 
muft be the water of cryftallization, or that which is fuperfluous 
to the ftandard. 
Hence, tft, 100 parts pure mineral alkali take up 143 nearly 
of ftandard, and fhould afford 414 of dry cryftallized Glauber. 
ad, roo parts cryftallized Glauber contain 24,16 of mere 
alkali, 34,54 of ftandard acid, and 41,3 of fuperfluous water; 
or if the falt be heated to drynefs, 100 parts of it will contain 
41 of alkali and 59 of ftandard acid. It is true, that if this 
cryftallized {alt be heated ftill further it will lofe more water, 
for I have found 100 parts to lofe 55, even when heated below 
ignition, but this proceeds partly from a lofs of the water inherent 
in the ftandard acid, and partly from a lofs of the acid itfelf, 
for the vapours and laft drop redden blue vegetable colours. 
Accorpinc to Mr. Bergman, 100 parts of this falt contain 
15 of alkali, 27 of the ftrongeft acid, and 58 of water; if fo, 
roo parts pure alkali fhould take up 180 of the ftrongeft acid 
(though he elfewhere fays only 177) and afford 666 of cryftal- 
lized falt, or 280 of that deprived of its water of cryftalliza— 
tion. 
THERE 
