120 VEGETABLE PHYSIOLOGY. 



tary bodies; and all investigations into the 

 organized parts of creation teach us to refer 

 more and more to a few simple principles, mo- 

 dified, indeed, by the nature and requirements 

 of each species, but all pointing to the same 

 law, which appears to prevail throughout the 

 Universe, that nothing shall be unnecessarily 

 complicated. 



