ON 7"REES AND BIRDS. 



71 



the bulldog is the opposite in form. If you gather 

 seed from a crotchy maple, like the one in this photo- 

 graph, you might procure healthy young trees, but 

 they would all have these same "forked" branches. 

 See the difference in the structure of the tree on 

 page 83. The study of the forms and the character of 

 the different trees will keep your minds pure. The 

 study of Nature is purifying to the mind. 



