1(^4 Analyfis of the Atr. 
fuch as phofphorus and brown paper dipped 
in water, ftrongly impregnated with nitre 
and then dryed. 
Sometimes I lighted the candle or large 
matches of brimftone before I whelmed the 
glafs z z, a a over them, in which cafe I 
inftantly drew up the water to a which 
by the expanfion of the heated Air would 
at firft fubfide a little, but then immediately 
turned to a rifing ftate , notwithftandiing the 
flame continued to heat and ratify the Air 
for 2 or 3 minutes : As foon as the flame 
was out, I marked the height of the wa- 
ter ^ ^ ; after which the water would for 
20 or 30 hours continue rifing a great deal 
above z z. 
Sometimes when I would pour violently 
fermenting liquors, as aquafortis, on 
any materials, I foTpended the aquafortis in 
a viol at the top of the glafs veflel zz aUy 
in fuch manner, that by means of a firing, 
which came down into the veflel x x y I 
could by inverting the viol pour the aqua- 
fortis on the materials, which were in a 
veflel on the pedeflal. 
I fhall now proceed to give an account 
of the event of a great many Experiments, 
which 
