that he even maintains, that ve 
- (Lr sau 
After all, he concludes with the 
following words, p. 310: ‘* When, 
 thefe obfervations are well confi- 
s¢ dered, I think it will hardly be 
*¢ doubted but that there is fome- 
** thing in the procefs of vegetation, 
* or at leaft fomething ufally az- 
“* tending it, that tends ta meliorate 
* the air, in which it is carried on, 
“€ whatever be the proximate caufe 
¢ of this effect, whether it be the 
“plants imbibing the phlogiitic 
<< matter, as part of their nourifh- 
** ment, or whether the phlogifton 
‘unites with the yapour that ig 
© continually exhaled from them ; 
“ though | of the two opinions I 
“ fhould incline to the former.” 
2 Mr. Sheele is fo far from thinking 
that air is meliorated by plants, 
= tation has the fame effect ‘on air 
that 
