Anatyfis of the Air. 
the vapours would have been lefs denfe, that 
in that cafe much lefs air would have been 
abforbed, perhaps a great deal lefs than was 
generated. 
In the fecond cafe of the Walton mineral. 
Experiment 96, when infteadof abforbing, 
it generated air, the parts of the Compound 
Aquafortis were then more at liberty to 
aft by being diluted with an equal quantity 
of water 5 whereby the ferment being 
more violent, the particles which confti- 
tuted the new elaftick air were thereby 
thrown off in greater plenty, and perhaps 
with a greater degree of elafticity, which 
might carry them beyond the fphere of at- 
traftion of the fulphureous particles. 
This is further illuftrated by Experiment 
94, where filings of Iron and oil of Vitriol 
alone generated very little; but the like 
quantities of filings of Iron, with an equal 
quantity of water, generated 43 cubick inches 
of air; and the like ingredients, with three 
times that quantity of water, generated 10S 
cubick inches. 
And tho' the quantity of the afeending 
fumes (which was in this cafe of the Walton 
mineral very great) muft needs in their afeent 
abforb a good deal of elaftick air for they 
X % will 
