2 28 Analyfts of the Air. 
(^ig* 35.) did in burning abforb much air; 
and it was the fame with Antimony and 
BriwJIo 72 e : Whence it is probable, that Vnl- 
Cano's, whofe fewel confift chiefly of Brim- 
(tone, mix'd with fevcral mineral and mc- 
talinc fubflarices, do not generate, but rather 
abforb air. 
We find in the foregoing Experiment 102 
on Nitre, that a great part of the new ge- 
nerated air is in a few days reforbed, or 
lofes its claflicity : But the air which is ab- 
forbed by burning Brimfione, or the flame 
of a Candle, dees not recover its claflicity 
again, at Icafl, not while confined in my 
glafles. 
Experiment C V. 
I made fcveral attempts to try, whether 
air full of the fumes of burning Brim- 
ftone was as comprcflible as common frefh 
air, by comprcfling at the fame time tubes 
full of each of thefe airs in the condenflng 
engine ; and I found that clear air is very 
little more compieflible, than air with fumes 
of Brirnflone in it : But I could not come to 
an exad certainty in the matter, becaufe the 
fumes 
