106 OUR NATIONAL FORESTS 



struction of National Forest improvements, par- 

 ticularly in the use of wood preservatives; advice 

 and assistance to persons on any matter connected 

 with the utilization of National Forest timber; the 

 preparation of publications upon subjects covered 

 by investigations which have practical or scientific 

 value ; and demonstrations of methods or processes 

 developed by the Forest Service for the benefit of 

 local communities. 



The presence on a Forest of large quantities of 

 unmarketable timber, or dead timber, or of mate- 

 rial not used in current sales would mean an inves- 

 tigation of methods for its utilization. Local 

 problems affecting wood-using industries in manu- 

 facturing or marketing timber, such as sap stain in 

 lumber, difficulties in seasoning lumber, and the 

 effect of difi'erent silvicultural methods upon the 

 average grades of lumber manufactured, are also 

 taken up with the Products experts at the District 

 Office. Also in the construction of National For- 

 est improvements the Forest Supervisor may need 

 assistance in applying wood preservatives to tele- 

 phone poles, fence posts, and other material. 

 Sometimes timber treating plants are erected, if 

 necessary, to treat not only material used on the 



