COMPILER'S NOTE 



For assistance in the preparation of this volume the 

 American Tree Association wishes to express its sin- 

 cere appreciation for the cooperation of State forestry 

 officials, officers of the United States Forest Service, 

 heads of educational institutions giving instruction in 

 forestry and secretaries of private forestry associations. 

 It would likewise like to acknowledge the aid of such 

 valuable sources of information as "The Forest Re- 

 sources of the World", by Zon and Sparhawk; "Forest 

 Products", and "The American Lumber Industry" by 

 Brown; the "History of Forestry", by Fernow; "Our 

 Vanishing Forests" by A. N. Pack, and other volumes. 



