KNOT ZONES AND SPIRAL IN ADIRONDACK RED SPRUCE 



787 



Table i.—Per Cents of Spiral, Showing Proportion of Total Number of Trees 



Above Stated, Diameter Limits Which are Straight, Which Spiral 



Less Than i Inch in 40 Inches, i Inch in 30 Inches, etc. 



(Table not Curved) 



All trees above 14 inches. . 

 All trees above 15 inches. . 

 All trees above 16 inches. . , 

 All trees above 17 inches. . , 

 All trees above 18 inches. . 

 All trees above 19 inches. . , 

 All trees above 20 inches. . 

 All trees above 21 inches. . 

 All trees above 22 inches. . 



Per cent as above for all trees i 



9 inches to 13 inches (in- 

 clusive 356 



I inch to 8 inches (inclusive) 178 



To further demonstrate the distribution of spiral by diameter classes, 

 the data are presented for other diameter-class groups than those shown 

 in the curves. It may be noted in Table i that the arbitrary diameter 

 of 14 inches chosen for the curve is fairly representative of the other 

 diameter limits above. Large trees are seen to be more severely spi- 

 raled than the smaller ones. 



Two stand tables are submitted, giving the number of trees above 14 

 inches. The one taken on Nehasane Park covers sufficient acreage to 

 be an average representation of all the types in the Adirondacks. The 

 other stand table was prepared from the hardwood type on the area 

 studied at Cranberry Lake. It represents an unusually good stand on 

 this type. 



Tari.e 2. — Number of Red Spruce 14 Inches and Over on 1,026 Acres in Nehasane 



Park, iSg7, Interpolated from Graded Stand Table, Bull. 26, 



United States Forest Service 



D. b. h. Number 



(outside bark) per acre 



14. 



15- 

 16. 



17- 

 18. 

 19. 

 20. 

 21. 

 22. 

 23- 

 24. 

 25- 



26. 



3.12 

 2.82 

 2.08 



1-53 



1.09 



.69 



•45 

 .29 

 .20 

 •IS 

 .08 

 •03 

 .02 



