248 WOOD AND FOREST. 



that the results of their investigations show conclusively that there 

 are many practical and inexpensive methods of control now available 

 thru the suggestions and recommendations in recent Department pub- 

 lications on forest insects, as well as thru direct correspondence with 

 the Department. These methods are based on the principle of pre- 



Fig-. 103. Ichneumon Fly whose 



I/arva Feeds on the Larva of the 



Pigeon Horn-tail. 



vention and not on that of extermination. It has been shown that 

 thru proper adjustment of the details in management of forests and 

 of the business of manufacturing, storing, transporting, and utilizing 

 the products a large percentage of the losses can be prevented at small 

 additional expense, and that even when considerable cost is involved 

 the amount saved will often represent a handsome profit. 



