







Ill 



■ 



302, Analyfis of the Air. . 



which muft: be done by the flame, and af- 

 cending fumes; becaufe in the burning of 

 any quantity ofBrimftone, 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 attract molt 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 CXXI. 



And further I have found that thefe fumes 

 leftroy the air's elafticity, for many hours 



after the Brimftone Match, which made 

 them, was taken out of theveffel, zz aai 

 (Fig. 35.) Thofe fumes being firft cooled 

 by immerfing that veflel and its ciftern xx, 

 or an inverted wine Flask, full of the fumes, 

 under cold water for fome time; then mark- 

 ins the furfaceof the water zz I immerfed 

 the vcflels in warm water : And when all 

 was cold again the following day, I found 

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



ftroyed 



