3 1 6 Of p r egetation] 



But as plants Have not a dilating and con- 

 trading Thorax, their infpirations and expi- 

 rations will not be fo frequent as thofe of 

 Animals, but depend wholly on the alter- 

 nate changes from hot to cold, for infpira- 

 tion, and vice verfa for expiration 5 and 'tis 

 not improbable, that plants of more rich 

 and racy juices may imbibe and ailimilate 

 more of this aereal food into their confuta- 

 tions, than others, which have more watry 

 vapid juices. We may look upon the Vine 

 as a good inftanceof this, which inExper. 3. 

 perfpired lefs than the Apple-tree. Por as it 

 delights not in drawing much watry nourifh- 

 ment from the earth by its roots, fo it 

 muft therefore neceffarily be brought to a 

 more ftrongly imbibing ftate at night, than 

 other trees, which abound more with watry 

 nourishment 3 and it will therefore confe- 

 quently imbibe more from the air. And likely 

 this may be the reafon, why plants in hot 

 countries abound more with fine aromatick 

 principles, than the more northern plants, 

 for they do undoubtedly imbibe more dew. 



And if this conjedure be right, then it 

 gives us a farther reafon, why trees which 

 abound with moifture, either from toofhaded 



a po : 



