[ 200 ] 



?f n - r cloudv, though it continued to be 



tity 



S; Swarm weather. 



troyed. 



SECTION IV. 



Experiments tending to invejligate 

 what quantity of dephlogijlicated 

 air a certain number of leaves 

 yield, 



30. ONE hundred leaves of the 

 Najlurtium Indicum were put in a 

 jar holding a gallon, filled with 

 pump-water ; it was expofed to the 

 fun in the ordinary way, as in Exp. 

 1 , between ten and twelve o' clock, 

 when fo much very fine dephlo- 

 gifticated air was fettled at the in- 

 verted bottom of the jar, that it 



filled 



