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. McLouo, 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." 



