viii PREFACE 



In conclusion, the authors wish to render acknowledgment 

 to the many friends who have assisted with helpful suggestions 

 in the preparation of this hook. 



In this revision an attempt has been made to conform as 

 closely as possible with the Terminology compiled by the Society 

 \ lu-rican Foresters. 1 



1 Forest Terminology, Journal of Forestry, Vol. XV, No. i, p. 68. Published 

 by the Society of American Foresters. 



