202 



STUDIES OF TREES 



and the cutting is regulated according to his findings. 

 Special attention is given to discovering new uses for species 

 of trees which have hitherto been considered valueless, 



FIG. 138. Government Foresters in Missouri Studying the Growth 

 and Habits of Trees. They are standing in water three feet deep. 



and the demand upon certain rare species is lessened by 

 introducing more common woods which are suitable for 

 use in their place. 



Aside from the perpetuation of the national forests. 



