ACKNOWLEDGEMENTS 
Many persons have contributed to the materials in this book. 
It is impossible to name them all. 
Plans or drawings have been supplied by the following land- 
scape architects: F. A. Cushing Smith, Chicago; Professor Frank 
H. Culley, Ames, Iowa; R. J. Pearse, Des Moines, Iowa; Francis 
A. Robinson, Des Moines, Iowa; R. R. Root, Chicago, Illinois; 
Joseph F. Whitney, Amherst, Mass.; William E. Philbrick, Taunton, 
Mass.; O. C. Simonds, Chicago, Illinois (courtesy of MacMillan 
Company, New York), Samuel D. Zehrung, Dayton, Ohio. I am 
especially indebted to my daughter, Dorothy Waugh, for many 
of the best designs and drawings in this book. 
Photographs have been contributed by Professor John W. 
Gregg, California; Professor Henry R. Francis, Syracuse, N. Y.; 
the United States Forest Service and National Park Service, Wash- 
ington, D. C.; Mr. O. P. Beckley, Harrisburg, Penn., and many 
others. Wherever possible acknowledgement of photographs is 
made with the reproductions. With rare exceptions photographs 
not specifically credited are made by the author. 
The chapters dealing with surveying are largely made up from 
the notes of my associate, Professor Arthur K. Harrison, to whom 
special thanks are due for this and much other effective help. 
To all who have helped in whatever manner most cordial thanks 
are offered. 
FRANK A. WAUGH 
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