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operation, fo as to produce quite the 

 reverfe, and to obtain a poifonous 

 air inftead of dephlogifticated air: 

 for the evaporation of bad air in 

 the dark depends on the vital mo- 

 tion within the plant, which, being 

 not influenced by the light of the 

 fun, produces a contrary effect* 

 Thus a plant growing in an abfolute 

 darknefs is without green "colour., 

 and fruit without the influence of 

 the light has no flavour. 



SEC- 



