L  ] 
Fourtuuy, To difcover the proportion of vitriolic acid carried 
over with the marine in his different receivers, he faturated 4 
ounces of each product with whiting, taking up the undiffolved 
part with diftilled vinegar, by thefe means he found that 4 ounces 
of the fpirit of falt in the receiver C afforded half an ounce and 
24 grs. of dried felenite, but the bottles (or more diftant receivers) 
contained none. 
ap EES. YS ae 
I must firft premife that the fpecific gravity of the oil of 
vitriol employed in decompofing the common {alt is not men- 
tioned; fince it is not, I muft fuppofe it to be the fame as that 
he employed in faturating the alkaline folution, whofe weight 
being to that of water as 24 to 13, its fpecific gravity, if taken 
at 60°, was 1,8461, which indicates by my table 88,3 per cent. 
{tandard, 
grs. 
Confequently four ounces Avoirdupois - o SSr7so 
Contained of ftandard acid 1750X 0,883 - =; gar 
And fince 100 parts pure vegetable alkali take up 
g2 of the vitriolic ftandard, the quantity of al- 
kali requifite to take up 1545 of vitriolic ftandard 
is - - - =" - 1680 
Therefore 11566 of the alkaline folution, faturated 
by this acid, contained of mere alkali - 1680 
