COOPERATIVE PROJECT 19 



two tanks and the rest of the equipment was purchased from State 

 Forestry funds. The understanding between the Forest Service 

 and the State Forester allows the Forest Service to make use of 

 this plant whenever it will not interfere with its use by the depart- 

 ment. Results of co-operative experiments shall be published only 

 by mutual consent of both parties. 



The following project has been outlined by the Forest Service : 



UNITED STATES DEPARTMENT OF AGRICULTURE 



FOREST SERVICE 



Forest Products Laboratory 



Rocky Mountain Division 



Project L-39 

 In Co-operation with the Colorado State Forestry Department, 



Fort Collins 



Experiments with Engelmann Spruce, Lodge-pole Pine, and Alpine 



Fir Fence Posts. 



WORKING PLAN 



PURPOSE. Reliable data are lacking concerning the durability, 

 both treated and untreated, of the timbers of the Rocky Mountain 

 legion suitable for posts when set under conditions of actual serv- 

 ice in the farming districts. Furthermore, there are no experi- 

 ments now under way which will yield the data needed for the 

 Plains region where nearly all the farming is carried on. Ma- 

 terial is now needed for a few trial runs at the plant erected at the 

 Agricultural College at Fort Collins as a co-operative undertaking 

 between the College and the Forest Service. The opportunity of 

 making the trial runs on material secured on the National Forests 

 under conditions that allow full information as to its origin, and 

 placed so as to afford means for careful future inspections, is thus 

 presented. The purpose in making the experiments will be : 



(1) To determine the relative absorption of creosote in an 

 open tank treatment of Englemann spruce, lodgepole 

 pine, and alpine fir in the round form. 



(2) To determine a definite time of treatment that can be 

 recommended for lodgepole pine posts for use with a 



single treating tank. 



(3) To determine the absorption of Engelmann spruce, 

 lodgepole pine, and alpine fir when given a brush treat- 

 ment of creosote and of crude oil. 



(4) To determine the life of untreated, brush-treated, and 

 open tank treated fence posts of Engelmann spruce, 

 lodgepole pine, and alpine fir, when set in the Plains re- 

 gion under typical farm conditions. 



