104 OUR NATIONAL FORESTS 



which do the greatest damage to game and domes- 

 tic stock, are transient visitors on the Forests which 

 frequent the Forests only when game and stock is 

 most abundant. They are bred, born, and spend 

 the greater portion of their hves in the foothills 

 outside of the National Forests. Under these 

 conditions the animals killed on the Forests are 

 quickly replaced by others from outside. For this 

 reason the matter was handed over to the Bio- 

 logical Survey, which will destroy these animals 

 throughout, the public domain and the results will 

 be much more permanent and effective. 



Besides the investigations carried on by the For- 

 est Experiment Stations many studies are carried 

 on dealing with forest products. The purpose of 

 the Branch of Forest Research of the Forest Serv- 

 ice is to promote the most profitable and econom- 

 ical utilization of forest products by means of ex- 

 periments and investigations. The work of the 

 Branch falls into three divisions: National Forest 

 utilization, the work of the Forest Products Labor- 

 atory, and industrial investigations. 



National Forest Utilization Experiments. The 

 work of the proper utilization of the products of 

 the National Forests is under the supervision of 



