[ 9* 1 



ihming upon it, in this very fub~ 

 stance or kind of plants, inch a me- 

 tamorphofis as to become what we 

 call now dephlogifticated air. This 

 real tranfmutation, though wonder- 

 ful to the eye of a philofopher, yet 

 is no more extraordinary than the 

 change of grafs and other vegeta- 

 bles into fat within, the body of a 

 graminivorous animal, and the pro* 

 duction of oil from the watery juice 

 of an olive tree. More examples 

 are to be feeri of fuch wonderful 

 tranfmutations of fublunary beings 

 in the article upon the mutability 

 of air. 



On purpofe to obtain in a fliort 

 time a great deal of dephlogifticated 

 air from this green matter, I ga- 

 thered a good deal of it from the 

 fides of a ftone trough placed near 

 a fpring upon; the high road, and 



always. 



