30 THE SCHOOL BOOK OF FORESTRY 



the forests in the same way that fertile farming 

 fields are managed. That is to say, they should 

 be so treated that they will yield a profitable 

 money crop every year without reducing their 

 powers of future production. Private owners 

 and farmers are coming slowly to realize the 

 grave importance of preserving and extending 

 our woodlands. The public, the State and the 

 Nation are now solidly behind the movement to 

 improve our forestry and to safe-guard our 

 forests. Several of the States, including New 

 York and Pennsylvania, have purchased large 

 areas of timberlands for State forests. 

 These will be developed as future sources of 

 lumber supply. 



