JOHN S. SPENCER, JR. , is a Forest Survey resource analyst. 

 He was graduated in forestry from Virginia Polytechnic 

 Institute and holds the M.F. degree from Montana State 

 University. His career with the U.S. Forest Service has 

 been chiefly on National Forests in Montana and California, 

 where he gained broad experience in timber management and 

 other resource management problems. Since entering re- 

 search he has written several Forest Survey publications. 



THOMAS O. FARRENKOPF is a Forest Survey associate 

 resource analyst at the Intermountain Forest and Range 

 Experiment Station. Since receiving his forestry degree in 

 1957 from the State University of New York, College of 

 Forestry, he has been engaged in timber inventories and 

 timber products surveys in the Rocky Mountain and 

 Intermountain areas. 



