I xxix } 



that refpiratiori has. He allows^ 

 however, that plants do not grow 

 to well in dephlogifticated as iii 

 common air. 



At the end of Section XXXIII, in 

 which he treats of the Spontaneous 

 emiffion of dephlogijlicated air from 

 water hi certain ckcwnftances^ he, 

 ipeaks thus : a It will probably be 

 " imagined, that the refult of the 

 M experiments recited in this Sec- 

 u tion throws fome uncertainty on 

 u the refult of thofe recited In this 

 " volume, from which I have con- 

 iC eluded, that air is meliorated by 

 " the vegetation of plants, efpecially 

 Ci as the water$ by which they were 

 " confined, was expofed to the bperi 

 * c air, and the fun, in a garden. 

 u To this I can only fay, that I was 

 " not then aware of the effect of 

 u thefe circumftances, and that I 



" have 



