C 347 3 



SECTION XV. 



Experiments Jhewing to what degree 

 of purity dephlogijlicated air may 

 be elaborated by vegetables. 



I T has appeared in the courfe 

 of feveral hundred experiments 

 which I made in my retirement, 

 that leaves of plants in general 

 yield the finerl air when they are 

 not much crouded together, fo that 

 the moft part of them receive the 

 direct influence of the fun prin- 

 cipally in the afternoon between 

 mid-day and fix o' clock in the 

 middle of the rummer* 



99.I obtained from feveral plants 



fuch a pure dephlogifricated air, 



that the flame of a wax-taper not 



R 4 only 



