Analyfts of the Air. 1 1 3 
When equal quantities of fVater and oil 
of Vitriol were poured on the fea fait it 
abforbed 15 cubick inches of air 5 but when 
in the like mixture the quantity of water 
was double to that of the oil of Vitriol then 
but half fo much air was abforbed. 
ExPERiMEryr C. 
I will next (hew, what efFefts feveral Al* 
kaline Mineral bodies had on the air in fer- 
menting mixtures. 
A folid cubick inch of unpowdered Chalky 
with an equal quantity of oil of VitrioU fer- 
mented much at firll, and in fomc degree 
for 3 days; they generated 31 cubick inches 
of air. The Chalk was only a little diflblved 
on its furface. 
Yet Lime made of the fame Chalk abforb- 
ed much air j when oil of Vitriol was poured 
on it, and the ferment fo violent that it 
breaking theglafs velTels, I was obliged to put 
the ingredients in an Iron velTcl. 
Two cubick inches of frelh LimCy and 
four of common white wine Vinegar ab- 
forbed in 15 days 22 cubick inches of air. 
4 
The 
