30 2, Analyfis of the Air. 



which muft be done by the flame, and at 

 cending 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 afcending fumes which 

 then attraft moft ftrongly, when re- 

 duced ad minima: And 'tis well known 

 that a Candle in burning flies all off into 

 flame and vapour, fo that what air it abforbs 

 muft be by thofe fumes. 



Experiment CXXL 



And further I have found thatthefe fumes 

 deftroy the air's elafticity, for many hours 

 after the Brimftone Match, which made 

 them, was taken out of thevefTel, zz, aa\ 

 (Fig. 35.) Thofe fumes being firft cooled 

 by immerfing that veffel and its ciftern x x> 

 or an inverted wine Flask, full of the fumes, 

 under cold water for fome time 5 then mark- 

 ingthe furfaceof the water zzl immerfed 

 the vefTels in warm water : And when all 

 was cold again the following day, I found 

 a good quantity of the air's elafticity was de- 

 stroyed 



