6 PREFACE. 



all standard authorities in matters pertaining to 

 the general subject of forestry. 



There have been added to the book, in the shape 

 of an appendix, lists of trees suitable for planting 

 in different sections of the United States, as fur- 

 nished by eminent authorities on the subject. 



The author desires to express his thanks to the 

 gentlemen who have responded to his circular 

 letter of inquiry as to lists of trees suitable for 

 replanting in various sections of the United States, 

 and to his friend Professor Charles S. Dolley for 

 revision of the manuscript of this book. 



EDWIN J. HOUSTON. 



CENTRAL HIGH SCHOOL, PHILADELPHIA, PA., 

 January, 1893. 



