% 3 * Analyjls of the djr. 



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- 

 ibrbed by burning Brimjlone, or the flame 

 of a Candle, doe$ not recover its elafticity 

 again, at leaft, not while confined in my 

 glafles. 



EXPERI MENT CV. 



I made feveral attempts to try whether 

 air full of the fumes of burning Brimjlone 

 was as compreflible as common frefli air, 

 by comprefling at the fame time tubes full 

 of each of thefe airs in the condenfing en- 

 gine j and I found that clear air is very lit- 

 tle more compreflible than air with fumes 

 of Brimjlone in it : But I could not come to 

 an exaft 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 comprefled them. See appendix 

 Vol 11./. 319, 320. 



Experiment C VI. 

 I fet a lighted tallow Candle, which w^s 

 about S of an inch diameter, under the in- 



yerted 



