THE USE BOOK. 171 



Forester by the supervisor or inspector. The recommendation 

 sffould be accompanied by a full description of the conditions 

 which make preservative treatments desirable, and by a state- 

 ment of the terms of cooperation offered by timber users. 



WOOD UTILIZATION LABORATORIES. 



Wood utilization laboratories of the Forest Service 

 are located at the University of Washington, Seattle, 

 Wash.; the University of California, Berkeley, Cal. ; 

 and the University of Colorado, Boulder, Colo., and 

 cooperate respectively with Forest officers in districts 

 1 and 6, 4 and 5, and 2 and 3. They work upon the 

 problems encountered in utilizing National Forest tim- 

 bers. When necessary, laboratory work will be supple- 

 mented by field studies. 



The Forest Service undertakes tests along any of the 

 following lines which may assist in more completely 

 utilizing the timber of the National Forests: 



(1) To determine the strength, toughness, and other 

 properties of wood, and the influence of such factors as 

 rate of growth, knots, checks, red heart, etc., on these 

 properties. 



(2) To determine the best methods of seasoning dif- 

 ferent woods. 



(3) To determine the suitability of different woods 

 for the manufacture of paper pulp. 



(4) To determine for any wood the valuable chem- 

 ical products which may at present be wasted, such as 

 tannin, turpentine, and wood alcohol. 



Statistical information is collected regarding the production 

 and consumption of forest products and on lumber prices and 



