Application of Presslers Formula 



263 



The Adirondack data were obtained on typical hardwood land 

 in St. Lawrence County, New York. Stump analyses were made 

 of 162 beech, 47 Yellow birch and 143 Hard maple trees. Incre- 

 ment borings were made on 200 hemlocks. The customary diame- 

 ter-age curves were prepared for the hardwoods; the data for 

 the hemlocks were also averaged and curved. Existing growth 

 tables for Red spruce and Balsam fir were used. It should be 

 noted that the Adirondack figures are for a forest from which 

 the soft woods were culled 17 years ago to a diameter of 8 inches 

 at point of cutting. This explains why, at present, the beech con- 

 stitutes 34 per cent of the stand (34% of volume), the birch 18 

 per cent of the stand (28% of the volume), the maple 15 per cent 

 of the stand (28% of the volume), the hemlock 11 per cent of 

 the stand (5% of the volume), the spruce 19 per cent of the 

 stand (3% of the volume), and the Balsam fir ^ per cent of the 

 stand (^% of the volume). The Catskill data were based 

 on virgin stands as far as the hardwoods are concerned. 



The results are given in Table 2. 



The current annual increment per cent must be translated into 

 terms of board feet in order to be useable. For example, in the 

 case of the hemlock in the Catskill data, the current annual in- 

 crement in board feet per acre would be figured as follows: 



continued in stock 

 table* 

 * Table 5, Bull. 11, N. Y. State Conservation Commission. 



5.478 



