aq) 
It feems that, in’ general, the 
-fineft air is obtained. Be the fun 
has a the meridian. 
SECTION XI. 
cs: ‘the Finds “which plants “pole Of of 
yielding dephlogifticated air, of cor- 
reciting foul air, and improving or 
dinary air, is not owing to the act 
a vegetation. 
= oe a faculty of Slants 
“depended. upon’ their vegetation, 
they would exert it at all times, and 
‘in all places i in which the vegetation z 
‘goes ~ one plant may vegetate, 4 
and even thrive very well, in the 
—— darknefs; and yet in fuch a : 
place : 
Fé 
