114 



FIRST BOOK OF -FORESTRY 



timber. Against storms the forester is helpless. Not 

 so with regard to ordinary winds. Against these, as we 

 have seen, he can protect the woods by the ordinary selec- 

 tion method so that no part of the forest is ever exposed ; 



FIG. 41. The Fires have cleaned up 

 (After Bureau of Forestry) 



and also by beginning with the cutting of any tract or 

 block of woods on the east side, and thus working in the 

 direction from which the prevailing wind comes. 



In other ways the elements often damage forests. 

 Frost kills young plants ; snow loads down the crowns of 

 weaker trees and bends them low, often breaking them ; 



