PREFACE TO SECOND EDITION. 
The first edition of 10,000 copies of “Forestry in Minne- 
sota’ was published by the Minnesota Forestry Association 
and has been received with much favor. It is now probably 
used in more than fourteen of the agricultural colleges as their 
chief text book on this important subject and it is also used in 
a number of normal and high schools in this and other states, 
either as a text book or as supplementary reading. The first 
edition is practically exhausted, but the demand for it continues 
to increase, and it is this demand, and the fact that it concerns 
a subject closely related to the development of this state, which 
has induced the Board of Regents to publish it as a portion 
of the report of the Geological and Natural History Survey of 
Minnesota. 
This edition covers all the ground reached by the first edi- 
tion, but it has been improved by the better classification and 
extension of the matter in Part I, and some additions and cor- 
rections to Part II. I think it greatly improved for the pur- 
poses of a text book, for which it is primarily intended. 
Since the publication of the first edition the world of science 
and especially the state of Minnesota have lost two helpful men 
in the death of Dr. Otto Lugger and J. S. Harris, each of whom 
assisted in preparing the first edition of “Forestry in Minnesota.” 
To me this is a personal bereavement, and I extend to their 
wives and children my most heartfelt sympathy and best wishes. 
In this revision I have had the loyal and painstaking help 
of my assistant, Mr. T. L. Duncan, and the chapter on Forest 
Mensuration has been almost entirely prepared by him. 
The drawings, with few exceptions, have been made under 
my direction by Miss M. M. Cheney. The half tone illustra- 
tions are mostly from photographs taken in the division of 
Horticulture and Forestry. Figure 32 is from a photograph 
