304 Analyjis of the Air. 



Exp e rime n't CXXL 



And further, I have found that thefe fumes 

 deftroy the air's elafticity for many hours after 

 the Brimftone Match, which made them, 

 was taken out of the vcffel z z a a: (Fig. 35.) 

 Thofe fumes being firft cooled by immerfing 

 that veffel and its ciftern x x y (or an inverted 

 wine flask, full of the fumes) under cold wa- 

 ter for fome time ; then marking the furface 

 of the water z z y I 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 deftroy ed by the 

 water's afcending above z z. And the event 

 was the fame upon frequent repetitions of the 

 fame Experiment. 



But if, inftead of the fumes of burning 

 Brimftone, I filled a flask full of fumes from 

 the fmoak of wood, after it had done flame- 

 ino- then there was but half as much air 

 abfbrbed by thole fumes, as there was by 

 the fumes of Brimftone ; viz. becaufe the 

 fmoak of wood was much diluted with the 

 watry vapour which afcended with it out 

 of the wood. And this is doublefs the rea- 

 fon why the fmoak of wood, though it in- 

 commodes 



