304 Analyfis of the Air, 
Experiment GXXI. 
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 veffel, zza a : 
(Fig. jj.) Thofe fumes being firft cooled 
by immerfing that veffel and its ciftern xx, 
(or an inverted wine Flask, full of the fumes) 
under cold water for fome time ; then mark- 
ing the furface of the water zz I immerfed 
the veffels in warm water : And when all 
was cold again the following day, I found 
a good quantity of the air’s elafticity was dc- 
ftroyed by the water’s afcending above zz. 
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 flam- 
ing, then there was but half as much air 
abforbed by thofe 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 doubtlefs the 
rcafon why the fmoak of wood, tho’ it in- 
commodes 
