t 29 ] 



immediately into cold water, are re- 

 markably quick in forming air bub*. 

 bles, and yielding the belt dephlo- 

 giflicated air. 



If it was the warmth of the fun, 

 and not its light, that produced this 

 operation, it would follow, that, by 

 warming the water near the fire 

 about as much as it would have 

 been in the fun, this very air would 

 be produced; but this is far fronT 

 being the cafe. 



I placed fome leaves in pump 

 water, inverted the jar f and kept it 

 as near the fire as was required to 

 receive a moderate warmth, near as 

 much as a fimilar jar, filled with 

 leaves of the fame plant, and placed 

 in the open air, at the fame time 

 received from the fun. The refult 

 was, that the air obtained by the 



fire 



