The author acknowledges with gratitude the assistance derived from the writings 

 or from consultations with the following : 



F. L. Mulford, Horticulturist, U. S. Dept. of Agriculture; 



H. R. Francis, Professor of Forest Recreation, Syracuse University; 



Samuel N. Baxter, Arboriculturist, Fairmount Park Commission, Phila., Pa.; 



Alfred Gaskill, Former State Forester of New Jersey; 



J. Franklin Collins, Forest Pathologist, U. S. Dept. of Agriculture; 



W. W. Colton, Former City Tree Expert of Newton, Mass.; 



C. A. Reed, Nut Culturist, U. S. Dept. of Agriculture; 



Nelson M. Wells, of the F. L. Olmstead Co., Landscape Architects, Brookline, 

 Mass.; 



E. P. Felt, State Entomologist, Albany, N. Y.; 



Carl Bannwart, Newark, N. J. Shade Tree Commission; 



Bernard E. Fernow, Former Dean of Forestry, University of Toronto; 



Lt. Col. C. O. Sherrill, U. S. Public Buildings and Grounds, Washington, D. C; 



Norman C. McLoud, of the National War Garden Commission; 



Joseph S. Illick, Penna. State Department of Forestry; 



Charles C. Deam, State Forester of Indiana; 



Charles Sprague Sargent, Author of " Manual of the Trees of North America. ;" 



Arthur Newton Pack, Author of "Our Vanishing Forests"; 



Filibert Roth, Dean of Forestry, University of Michigan, Ann Arbor, Mich.; 



J. J. Levinson, Former Forester Prospect Park, Brooklyn, N. Y.; 



Mrs. N. Brenizer, Artist of the U. S. Forest Service; 



Prof. Nelson C. Brown, Professor of Forest Utilization, Syracuse University; 



Col. W. B. Greeley, U. S. Forester; 



Col. Henry S. Graves, Former U. S. Forester; 



Francis D. Gallatin, Park Commission, New York City; 



C. P. Close, Horticulturist, U. S. Dept. of Agriculture; 



Luther Burbank, and others. 



The author also secured valuable information and illustrations from the following 



publications: 

 "Insects Affecting Park and Woodland Trees, New York State Museum Memoir 



No. 8 "; 

 "U. S. Farmers Bulletin No. 1209 Planting and Care of Shade Trees"; 

 "U. S. Farmers Bulletin No. 1208 Trees for Town and City Streets "; 

 "Bulletin No. 170 Massachusetts Agricultural Experiment Station on Shade 

 Trees." 



