TO 



CHARLES SPRAGUE SARGENT, LL.D. 



PROFESSOR OF ARBORICULTURE, FOUNDER AND DIRECTOR 



OF THE ARNOLD ARBORETUM, HARVARD UNIVERSITY 



AUTHOR OF THE 



"SYLVA OF NORTH AMERICA" 



WHOSE LIFE HAS BEEN DEVOTED TO THE STUDY OF 



TREES 



AND WHO, MORE THAN ANY OTHER MAN IN AMERICA, 



HAS AWAKENED INTEREST AND PROMOTED KNOWLEDGE 



IN THE TREES OF THE NORTHERN HEMISPHERE 



AS A TOKEN OF THE AUTHOR'S ADMIRATION 



AND ESTEEM 



THIS WORK IS DEDICATED 



vii 



128470 



