SMITHSONIAN INSTITUTION LIBRARIES 



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(4) The prevention of future losses by the practice of improved 

 forestry methods to eliminate fayorable conditions for injur}^ and con- 

 tribute to a perpetual supply of vigorous, healthy timber to be utilized 

 before it passes the stage of profitable increment. 



It should be remembered that the different species of insects which 

 cause defects in the wood of living timber require different details in 

 the methods of control, and that special cases, special local conditions, 

 and details in business methods and requirements determine which 

 one of the available methods should be adopted. 



It should also be remembered that in the more important cases much 

 loss of time and money may be prevented and the best success attained 

 by first securing some authoritative advice on the insects involved 

 and the specific requirements for the control work. 



Approved : 



James Wilson, 



Secretary of Agriculture. 

 Washington, D. C, October 7, 1910. 



[Cir. 126] 



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