FOREST SERVICE. 
WILLIAM B. GREELEY, Forester. 
E. A. SHERMAN, Associate Forester. 
BRANCH OF RESEARCH, 
Earle H. Clapp, Assistant Forester in charge. 
S: T. Dana, Assistant Chief. 
Forest Products Laboratory. 
Carlile P. Win slow, Director. 
Ovid M. Butler, Assistant Director. 
SECTION OF TIMBER PHYSICS. 
Rolf Thelen, Engineer in Forest Products in charge. 
