THE PRINCIPLES 



OF 



DESCRIPTIVE AND PHYSIOLOGICAL 



BOTANY. 



INTRODUCTION. 



OBJECTS OF BOTANICAL INVESTIGATION (2.). DESCRIPTIVE AND 



PHYSIOLOGICAL BOTANY SUB-DIVISIONS (3.). ADVANTAGES 



OF OUR PURSUIT (4.)' UNORGANISED AND ORGANISED 



BODIES (/>.). DISTINCTION BETWEEN ANIMALS AND VEGE- 

 TABLES (7.). 



(1.) OF the advantages which accrue from the culti- 

 vation of the natural sciences, sufficient has been said in 

 the treatise of Sir J. Herschel, forming our fourteenth 

 volume ; and Mr. Swainson, in his discourse, which 

 forms our fifty-ninth volume, has further exposed the 

 importance of the study of Natural History in general, 

 and more particularly of that department which he so 

 successfully cultivates. In introducing the science of Bo- 

 tany to the general reader, for whom more especially this 

 volume is designed, rather than for the scientific adept, 

 it will be right that we should follow the example which 

 has thus been set us, and say a few words by way of 

 introduction to our present subject. Whenever we are 

 about to enter upon any science which is new to us, it 



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