PRINCIPLES 



OF 



AMERICAN FORESTRY. 



BY 



SAMUEL B. GREEN, 



Professor of Horticulture and Forestry, University of Minnesota^ 



Member of the Forest Reserve Board of the State of 



Minnesota; Author of " Forestry in Minnesota" 



FIRST EDITION'. 



SECOND THOUSAND. 



NEW YORK: 

 JOHN WILEY & SONS. 



LONDON: CHAPMAN & HALL, LIMITED. 

 1907. 



