[ 46 ] 
Of Common Sal Ammoniac. 
100 grs. of aerated volatile alkali diffoived in 1000 of water, 
required for their faturation 246 of fpirit of falt, whofe fpecific 
gravity being 1,1355, contained by my table 34 grs. ftandard 
per cent. and the quantity employed held 83,64 ftandard; the 
lofs of air was 43 grs. and confequently the quantity of pure 
alkali 33,8 grs. the {pecific gravity of the faturate folution 1,0269, 
the whole weight was 1303, which by a teft experiment in- 
1303 
. ; . I 
dicated its faline contents to be ———, now 
10,67 
10,67 
=122,118 gts. 
Now the fum of pure alkali and ftandard=117,44,; the dif- 
ference therefore of thefe two quantities, viz. 4,67, muft have 
‘been water united to the ftandard acid. 
HeENcE 100 parts pure alkali take up 247,1 ftandard, and fhould 
produce 361 of cryftallized ammoniac. 
adly, too parts fal ammoniac then contain 27,62 of alkali, 
68,49 of ftandard, and 3,89 water; yet when I made this ex- 
periment after the antient method I obtained a much {fmaller 
proportion of falt. 
Havine diffolved 200 grs. of aerated volatile alkali in 1800 of 
water, and faturated it with the fame marine acid, of which 
it required 486 grs. with the lofs of 100 grs. of fixed air, the 
evaporated folution afforded only 224 grs. Now the quantity 
of 
—'! 
