[ 204 ] 

 morning a fmall quantity of air 

 was fettled at the inverted bottom 

 of the jar, in which a candle was 

 extinguifhed directly. 



37. At nine o'clock in the even- 

 ing, Auguft 8, when no leaves 

 would yield any more air bubbles, 

 except potatoe-leaves (which always 

 begin the mil to yield air in the 

 morning, and ceafe to yield them 

 at night the laft of all), I filled dif- 

 ferent jars with pump- water, and 

 put in each a good deal of leaves 

 of fome or other plant or tree, viz. 

 leaves of oak, lime-tree, willow, yew- 

 tree or taxis, apple-tree, fage or fal- 

 via, artichoke, perjicaria urens or 

 water pepper, potatce leaves ; they 

 were all kept in a room till next 

 morning, when I examined the air 

 which they had yielded. 



Early 



