C 250 3 



^ aR ; f As this green matter is probably 

 aksS ^ tne vegetable kind, I make no 

 uo )' £d ' doubt but as good dephloginicated 

 air might be obtained from leaves 

 of plants by fome way or other 

 which I have not yet been lucky 

 enough to hit upon. 



However pure this dephlogiftir 

 cated air may be, that which may 

 be extracted from certain fubftances 

 which do not belong to the vege- 

 table kingdom is fKll fuperior to 

 it, as is the air obtained from nitre 

 and red precipitate. 



To give an exact account of the 

 nature of thefe airs, I will place 

 here the remit of the firft menti- 

 oned dephlogifticated air, drawn from 

 the green matter, produced by itfelf 

 in the jar. The method of trying 

 it was that of Abbe Fontana, 2.05 ; 

 2.01; 1.93; 1.8 if; 1.727; 1.707; 

 6 45 2.62 T ; 3.55. 



The 



