Introductory. 



The first two oi ? this series of papers, with one on Fungi 

 <>f X ativo and Shade Trees, by Dr. Byron D. Halsted, were 

 originally published in the report of the Forest Park Reserva- 

 tion Commission of Xew Jersey for 1908. Appreciative de- 

 inauds having exhausted the edition, Mr. Charles Lathrop 

 Pack, a member of the Forest Commission, and a well known 

 pioneer in Forest Conservation, generously offered to de- 

 fray the cost of a new issue. This offer was accepted and the 

 Forest Commission has caused two of the papers to be thor- 

 oughly revised and a new one dealing with tree diseases to be 

 prepared by the recently appointed State Plant Pathologist. 



The State is committed to the policy of protecting, improv- 

 ing and increasing the number of its shade trees. This bul- 

 letin is published under the direction of the 



. , Authority. 



Forest Park .Reservation Commission with the 

 co-operation of the Trustees of the State Agricultural Ex- 

 periment Station. Fach paper is by an acknowledged au- 

 thoritv in his line. 



Fig. 1. Elms 30 years old, well placed, well spaced, well guarded. (Courtesy of 

 U. 8. Forest Service.) 



