VI Preface 
subject, that which would be most useful to those readers for 
whom the book is intended, namely, the practical lovers 
and owners of trees. 
Special acknowledgment is due to Dr. N. L. Britton 
under whose supervision the drawings of exotic tree species 
— and only such have been illustrated — were made. It is 
due to him to explain, that in the captions under these 
illustrations, contrary to the usage of Dr. Britton and 
many other botanists, species names derived from patro- 
nymics have been capitalized to conform with the mode of 
notation applied in the text, which is the mode still in use 
in most nurserymen’s catalogues. 
The author acknowledges his indebtedness to a large 
number of publications, too many to cite, from which he 
has extracted ,information, especially the many bulletins 
of Experiment Stations on combating insects and fungi. 
He claims originality mainly in the manner of presentation, 
and hopes that he has performed a useful service. 
B. E. F. 
Toronto, March, 1910. 
