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.” 
