ACKNOWLEDGMENT 



The author wishes to express his appreciation to the U. S. Forest 

 Service and the National Park Service, and to individual members of 

 these organizations, for material and especially for their excellent 

 spirit of cooperation and assistance. He is indeed grateful to the 

 Forest Service for data on forest resources and other information as 

 found in several publications, notably in the Copeland Report, Senate 

 Document No. 12, 1933, and for the photographs shown as: frontis- 

 piece, and Figs. 3 to 7 inclusive, 14, 16, 20, 21, 23, 24, 26, 27, 29 to 

 51 inclusive, 53 to 57 inclusive, 59, 60, 62, 67 to 70 inclusive, 72 to 74 

 inclusive, 77, 82 to 86 inclusive, 93, 96 to 109 inclusive, 116, 117, 119, 

 120, 122, 123, 128 to 135 inclusive, 137 to 139 inclusive; and to the 

 National Park Service for Figs. 110 to 115 inclusive. 



The author is also indebted to a number of lumber manufacturers, 

 state foresters, loggers, forest rangers, and others for valuable data 

 and information secured on several visits to the National Forests, 

 National Parks, and private operations in the Rocky Mountains, the 

 Pacific Coast States, the South, and the Lake States. Many data were 

 also obtained on visits to more than a hundred Civilian Conservation 

 Corps Camps in the western states as well as to several in the south- 

 ern Appalachian region and in the Northeast, and studies on the 

 ground of the Tennessee Valley Authority, Plains Shelterbelt Project, 

 and the Soil Conservation Service. To several colleagues of the fac- 

 ulty of the New York State College of Forestry I am indebted for 

 valuable suggestions, assistance, and criticisms. 



