t n ] 



forb from it, and to prefent, if 

 I may fo fpeak, this fubftance 

 drawn from the common atmo- 

 fphere to the direct rays of the fun, 

 on purpofe to receive the benefit 

 which the influence of that great 

 luminary can give it. 



SECTION XIX. 



On the power which vegetables have 

 of abf orbing different kinds of air. 



IF a plant is fhut up in a cer- 

 tain quantity of air, and all light 

 hindered from falling upon it, it ab- 

 forbs in general more air than it 

 yields, and therefore the bulk of air 



is 



