z^z Anafyfis of the 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 elafticity : But the air which is ab- 
forbed by burning Brimjione , or the flame 
of a Candle, does not recover its elafticity 
again, at leaft, not while confined in my 
glaffcs. 
Experiment C V, 
I made feveral attempts to try whether 
air full of the fumes of burning Brimjione 
was as compreffible as common frelh air, 
by compreiling at the fame time tubes full 
of each of thefe airs in the condenfing en- 
gine; and I found that clear air is very lit- 
tle more compreffible than air with fumes 
of Brimjione in it: But I could not come to 
an exad certainty in the matter, becaufe the 
fumes were at the fame time deftroying the 
elafticity of the air. I took care to make 
the air in both tubes of the fame tempera- 
ture, by firft immerfing them in cold water, 
before I compreffed them. 
• Experiment CVL 
1 fet a lighted tallow Candle , which was 
about A of an inch diameter, under the in- 
verted 
