[ 28 ] 



SECTION VI. 



*fhe production of the dephlogiftkated 

 air from the leaves is not owing to 

 the zvarmth of the fun, but chiefly, 

 if not only, to the light, 



I F the fun caufed this air to ooze 

 out of the leaves by rarifying the 

 air in heating the water, it would 

 follow that, if a leaf, warmed in 

 the middle of the fun-mine upon 

 the tree, was immediately placed in 

 water drawn directly from the 

 pump, and thus being very cold, 

 the air bubbles would not appear 

 till, at leaft, fome degree of warmth 

 was communicated to the water ; but 

 quite the contrary happens. The 

 leaves taken from trees or plants in 

 the miditof a warm day, and plunged 

 I im- 



