THE AUTHORS 



CHARLES A. WELLNER is Assistant Director in 

 charge of Forest Insect, Disease, and Timber 

 Management Research at Intermountain Station. 

 His entire Forest Service career has been at 

 the Northern Rocky Mountain and Intermountain 

 Stations . 



DAVID P. LOWERY is Wood Technologist at the 

 Intermountain Forest and Range Experiment 

 Station, Missoula, Montana. He has done re- 

 search at the Forest Products Laboratory and 

 in the Intermountain West since 1952. 



