t *4 ] 



SECTION II. 



On the manner in which the dephlo* 

 gijticated air is obtained front the 

 leaves of plants, 



AS the leaves of plants yield de- 

 phlogifticated air only in the clear 

 day-light, or in the fun-lhine, and 

 begin their operation only after they 

 have been in a certain manner pre- 

 pared, by the influence of the fame 

 light, for beginning it; they are to 

 be put in a very tranfparent glafs 

 vefTel, or jar, filled with frefh pump 

 water (which feems the moil adapted 

 to promote this operation of the 

 leaves, or at leafl not to obftruct it) ; 

 which, being inverted in a tub full 

 of the fame water, is to be imme- 

 diately expofed to the open air, or 



rather 



i 



