C 240 ] 



SECTION XIV. 



Experiments Jhewing what kind of 

 water ob/truSs leaft the natural 

 operation of leaves yielding de- 

 phlogijlieated air* 



94. AN equal number of willow 

 leaves were put in four different jars, 

 each holding a gallon ; one jar was 

 filled with itagnating water taken 

 out of a pond rather unclean ; the 

 fecond jar was filled with rain-water 

 collected the day before ; the third 

 with river-water ; and the fourth 

 with w T ater taken frefh from the 

 pump. They were all placed, at 

 eleven o' clock, upon a wall in the 

 fun-ihine ; and the air yielded by 



the 



