568 



JOURNAL OF FORESTRY 



former for the timber growing in the Catskills, the latter for the timber 

 on Peninsula State Park. The data in Table 1 were not made for the 

 Catskill tract under discussion, but for a parcel of State land but a 

 short distance away.'' Similarity of forest and site conditions war- 

 ranted the use of these data for the working plan in question. 



Time was not available for growth studies on the Wisconsin Park, 

 and for this reason growth tables best suited for that part of the state 

 were used. Reference to the source of growth tables will be found in 

 Table 3. The current annual increment per cents were curved in 

 each case. 



To illustrate the methods of dividing the volumes and the incre- 

 ment therein into the group divisions necessary to the use of the Swiss 

 Method, Table 3 is presented. This shows by diameter the volume 

 and increment, both in per cent and in board feet, therein, for the hem- 

 lock in the Catskill tract. 



' Bulletin 11, New York State Conservation Commission; "A Forest Survey of 

 a Parcel of State Land," Albany, N, Y., 1915. For. Quart., Vol. XIV, No. 2, "A 

 Partial Application of Pressler's Formula," p. 261. 



