Analyfis of the Air . 303 
abforbing %$ eubick inches as before, it 
generated 80 cubick inches of air : So that 
fermenting mixtures, which have fulphur in, 
them, do not always abforb, but fometimes 
generate air : The reafon of which in the 
Experiment now under confideration feems 
to be this, viz. in the firft cafe a good quan- 
tity of elaftick air was generated, by the 
inteftine motion of the fermenting ingre- 
dients 5 but there arifing thence a thick, acid, 
fulphureous fume, this fume abforbed a 
greater quantity of elaftick air than was be- 
fore generated : And we find by Experiment 
103 that the fulphureous particles which fly 
off in the air, do by their attra&ion deftroy its 
elafticity 5 for in that Experiment burning 
Brimftone greatly deftroy ed the air's elafticityi 
which mull: be done by the flame, and at 
tending fumes > becaufe in the burning of 
any quantity of Brimftone, the whole mafs 
is in a manner wafted, there remaining only 
a very little dry Earth : And therefore the 
abforbed air cannot remain there, but muft 
be abforbed by the afeending fumes which 
then attrad rnoft ftrongly, when reduced 
*ad minima: And 'tis well known that a 
Candle in burning flies all off into flame 
and vapour, fo th^at what air it abforbs muft 
be by thole fumes, E x p e- 
