442 



TIMBER RESOURCES FOR AMERICA'S FUTURE 



4.0 



3.5 



^2.5 



O 



C2 



o 







1906 1915 1925 



SOURCE: U.S. Department of Commerce, Bureau of the Census. 

 U.S. Department of Agriculture, Forest Service. 



1935 



1945 



1955 



Figure 128 



