Analyfi^ of the Air. 303 
ft'royed 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 
Birmftone, 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. becaufc 
the fmoak of wood was much diluted with 
the watry vapour which afeended with it 
out of the wood. And this is doubtlefs the 
reafon why the fmoak of wood, tho' it in- 
commodes the lungs, yet it will not fuffocate 
like that of Charcoal, which is withal more 
fulphureous, without any mixture of watry 
vapours. 
And that new generated elaftick air Is re- 
forbed by thefe fumes, I found by attempting 
to fire a Match of Brimftonc with a burn- 
ing glafs, by means of a pretty large piece 
of Brown Paper which had been dipped 
in a ftrong folution of Nitre, and then 
dryed: Which Nitre in detonizing generated 
near two quarts of air, which quantity of air, 
and a great deal more, was abforbed, when 
the Brimftonc took fire and flamed vigoroufly. 
I 
