THE STEM 129 



(4) Select a small plot, about a fourth of an acre, of any wooded tract 

 in your neighborhood, and make a study of all the trees and shrubs it con- 

 tains. Make a list of the different kinds, with the number of each. Take 

 note of those that .show themselves, by vigor and abundance of growth, 

 best adapted to the situation. These are the "climax" or dominant 

 vegetation of the plot. Find out, if you can, to what cause their superi- 

 ority is due. 



