C 59 ] 

 fruit, at leafl of fame, furpafTes the 

 deleterious quality of flowers in the 

 dark ; bat the influence of the fun 

 feems to check, in fome degree, this 

 hurtful quality in forne fruit more 

 than in roots and flowers, of which 

 the molt part preferve, even in the 

 brighter!: fun-fliine, their virulent 

 effects upon the ambient air in its 

 full force. I found, that one peach 

 was able to render intirely poifonous, 

 in a few hours, a body of air at leaf!: 

 fix times greater than the fpace it 

 occupied; and even that they could, 

 in the middle of the fun-fhine, ren- 

 der fuch a quantity of air fo un- 

 wholefome, that a candle could not 

 burn, nor an animal breathe in it. 



After I had obferved, that all 

 leaves of plants yield dephlogifti- 

 cated air by day-light ; and coniider- 

 ing, that in general all leaves are 



green, 



