Se es ee ree See er a ee ee 
aS 
forb from it, and to prefent, if 
I may fo fpeak, this fubftance 
drawn from the common atmo- 
iphere to the direct rays of the fun, 
on purpofe to receive the benefit 
which the influence of that as 
luminary can give it. 
On the power which vegetables have 
: eo abforbing different kinds of air. 
IF a 2 plant is fhut up in a cer- 
tain quantity of air, and all light 
hinderat from falling upon it, it a6 
forbs in generat more air than it 
Yields, and therefore the bulk of air 
is 
