C 95 1 



SECTION XXIV. 



tfbe largeft and the more perfecl 

 leaves yield more and purer deph- 

 logifticated air, than thofe which 

 are not yet full grown. 



N OTH I N G feems to me a more 

 convincing proof that the elabora- 

 tion of dephlogifticated air is an 

 effect: of a kind of vital motion in 

 the texture of the leaves, than that 

 young leaves, not yet grown to 

 their natural fize, yield their air- 

 bubbles flower and lefs in bulk, 

 and that the air yielded by full- 

 grown leaves furpaues in purity 

 that which is obtained from leaves 

 not yet come to perfection. 



I It 



