pine. The bark rarely exceeds 2 inches in thickness, even at the butt 

 of the tree, the average being about l 1 /^ inches for the larger trees. 

 Douglas fir bark, on the other hand, for corresponding diameters varies 

 from 4 inches to 8 inches in thickness. Table 6 gives the average con- 

 tents in board feet of noble fir based on measurements of 77 trees on 

 Larch Mountain. 



TABLE 6 



Total contents in board feet of old growth noble fir from measure- 

 ments of 77 trees on Larch Mountain, near Palmer, Ore. Trees scaled 

 by the Scribner Dec. C Rule in 16-foot log length or less to an average 

 diameter of 15 inches inside the bark at the top. Stump height taken 

 equal to the D. B. H. Average merchantable length, 156 feet, average 

 total height 192 feet. Read from curves. 



D. B. H. Inches Merch. Vol. Bd. Ft. Basis, No. of Trees 



30 

 32 

 34 

 36 



38 

 40 



42 

 44 

 46 



48 

 50 



52 

 54 

 56 

 58 

 60 



62 



64 

 66 



68 

 70 



72 



2,220 

 2,650 

 3,100 

 3,560 

 4,040 

 4,540 



F.070 



5,630 

 6,200 

 6,840 

 7,500 



8,180 



8,900 



9,630 



10,400 



11,170 



11,960 

 12,750 

 13,560 

 14,380 

 15,200 

 16,020 



12 

 4 



6 



5 

 5 



WOOD DISTILLATION PLANT 



55 



