







72.6 



Of Vegetation'. 



But as plants have not a dilating and con- 

 tracting 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 ; and 'tis 

 not improbable, that plants of mote tich 

 and racy juices may imbibe and afiimilate 

 more of this acreal food into their conftitu- 

 tions, than others, which have more vvatry 

 vapid juices. We may look upon the Vine 

 as a good inftance of this, which in Exper. 3, 

 perfpired lefs than the Apple tree. For as it 

 delights not in drawing much watry nourifh- 

 ment from the earth by its roots, fo it 

 muft therefore neceflarily be brought to a 

 more ftrongly imbibing ftate at night, than 

 other trees, which abound more with watry 

 nourifhment; 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 conjecture be right, then it 

 gives us a farther reafon, why trees which 

 abound with moifture, either from too fliaded 



a PQ: 



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