Te Oe Fae ane ne ee ee eS 
. 79 3 
This abforption -alfo takes place 
in the day time; but as the plants 
at that time yield themfelves'a great 
quantity of air, the abforption is 
not fo eafily afcertained. 
SECTION XxX. 
On the beft manner of judging whe- 
ther the plants are ready to: yield 
their depblogifiicated air. 
AS the light of the fun, and not 
the warmth, is the chief caufe, if 
not the only one, which makes the 
plants yield their dephlogifticated 
air, it feems reafonable to think, 
that in a bright fun-fhiny morning 
< oe the 
