THE AUTHORS 



CLARENCE S. (SAM) SINCLAIR received a B.S. degree in forestry, 

 timber management, from University of Montana in 1951. From 

 1951 to 1963, he worked on the Flathead and St. Joe National 

 Forests in the Northern Region and on the Lincoln National For- 

 est in the Southwestern Region of the Forest Service. He was 

 District Ranger on the Ruidoso Ranger District, Lincoln Nation- 

 al Forest, from 1958 to 1960, and on the Avery Ranger District, 

 St. Joe National Forest, from 1960 to 1963. He was assigned 

 to the St. Joe National Forest Supervisor's Office timber man- 

 agement section in 1963 as Forest Silviculturist. Within the 

 past year his duties have been expanded to include logging engi- 

 neering and timber sales preparation for the St. Joe National 

 Forest. 



RAYMOND J. BOYD received a B.S. degree in general sciences 

 from Colorado State University in 1949 and his master of forest- 

 ry degree in 1951. From 1949 to 1953 he did silvicultural re- 

 search for the Rocky Mountain Forest and Range Experiment 

 Station. Since 1953 he has been working on silviculture of west- 

 ern white pine at Moscow, Idaho. 



