164 Analyfis of the Air. 



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 brimflone before I whelmed the 

 glafs z z a a over them, in which cafe I 

 inftantly drew up the water to a a, which 

 by the expanfion of the heated Air would 

 at firft fubfide a little, but then immediately 

 turned to a rifing ftate , notwithftandkig the 

 flame continued to heat and rarify the Air 

 for 2 or 3 minutes : As foon as the flame 

 was out, I marked the height of the wa- 

 ter z zj after which the water would fot 

 20 or 30 hours continue rifing a great deal 



above z z. 



Sometimes when I would pour violently 

 fermenting liquors, as aquafortis, &c. on 

 any materials, I fufpended the aquafortis in 

 a viol at the top of the glafs veflel z z a a, 

 hi fuch manner, that by means of a firing, 

 which came down into the veflel x x , I 

 could by inverting the viol pour the aqua- 

 fortis on the materials,, which were in a 

 veflel on the pedeftaL 



I (hall now proceed to give an account 

 of the event of a great many Experiments, 



which 



