DISTILLATION OF STUMPWOOD. 5 



Table 1. — Stands of western yellow pine in California, Oregon, and' Washing- 

 ton, with reduction factors for various volumes and diameters of trees and 

 stumps. 1 



Diameter. 



Average volume — 



Breast 

 high. 



Reduc- 

 tion, 

 breast 

 height to 

 stump 

 height. 



Stump 

 high.2 



Of 



trees. 



Of 

 stumps. 



Reduc- 

 tion 

 units for 

 different 

 volumes 



and di- 

 ameters. 



Inches. 

 22 

 23 

 24 

 25 

 26 



26.5 

 27 

 28 

 29 

 30 

 30.5 

 32 



32.5 

 33 



33.5 

 34 

 35 

 36 

 37 

 38 

 39 

 40 

 41 



41.5 

 42 

 43 

 44 

 45 



Inches. 

 2 

 2 

 2 

 2 

 2 

 2 

 2 



2.5 

 2.5 

 2.5 

 2.5 

 2.5 

 2.5 

 2.5 

 2.5 

 3 

 3 

 3 

 3 

 3 



3.5 

 3.5 

 3.5 

 3.5 

 3.5 

 3.5 

 3.5 

 4 



Inches. 

 24 

 25 

 26 

 27 

 28 

 28.5 

 29 



30.5 

 31.5 

 32.5 

 33 



34.5 

 35 



35.5 

 36 

 37 

 38 

 39 

 40 

 41 



42.5 

 43.5 

 44.5 

 45 



45.5 

 46.5 

 47.5 

 49 



Bd.ft. 

 500 

 600 

 750 

 850 

 950 

 1,000 

 1,150 

 1, 250 

 1,350 

 1,425 

 1, 500 

 1,600 

 1,750 

 1,850 

 1,925 

 2,000 

 2,150 

 2,250 

 2,400 

 2, 500 

 2,600 

 2,750 

 3,000 

 3,250 

 3,500 

 3,750 

 3,900 

 4,000 



Cords. 

 0.25 



1 



.375 



1.5 







. 5 



2 



.625 



2.5 







.75 



3 





3.5 



.875 





1 



4 



1.125 



4.5 



1.25 



5 



1.375 



1.5 



1.625 



1.75 



1.875 



5.5 



6 



6.5 



7 

 7.5 



2 



8 



1 This working table must be adapted by the user to meet the variations from the normal stand as they 

 are found to occur. The volumes inboard feet represent close approximations of the averages of all 

 obtainable volume tables for the regions named. The volumes in cords are taken from measurements of 

 corded stumpwood in various regions, and are as conservative, when the wood is split for the retort, as 

 those used for volume, B. M. 



a The height of the stump is here assumed to be 18 inches. For higher stumps the diameter would be 



duced according to the scale, as given in columns 5 and 6. 



Table 2. — Sample cruises of California yellow pine from different parts of the 

 State, with volume and acre equivalent in number of stumps of various diam- 

 eters required to produce the given yields {area covered, 6,400 acres, average 

 stand, or slightly better). 1 



Location. 



Eldorado, T 8 N, R 15 E, sec. 35. 

 Lassen, T 25 N, R 14 E, sec. 24. . . 

 Lassen, T 27 N,R 10 E, sec. 5.... 

 Lassen, T 32 N,R 8 E, sec. — .... 

 Modoc, T 46 N, R 15 E, sec. 32.. . 

 Plumas, T 23 N, R 9 E, sec. 5. . . . 

 Sequoia, T 13 S, R 19 E, sec. 19 . . 



Sierra, T 5 S, R 21 E, sec. 18. 



Sierra, T 6 S, R 24 E, sec. 27 



Stanislaus, T 4 N R 18 E, sec. 17 



Average for 6,400 acres 



Volume 

 per acre. 



Bd.ft. 

 10,082 

 10, 501 

 18, 236 

 12, 253 

 12,444 

 9,503 

 5,870 

 10, 518 

 17, 163 

 12, 276 



11,884 



Number stumps. 



24- 

 inch. 



20.00 

 21.00 

 36.40 

 24.50 

 24.88 

 19.00 

 11.74 

 21.02 

 34.32 

 24.55 



23.75 



28.5- 

 inch. 



10.00 

 10.50 

 18.20 

 12.25 

 12.44 

 9.50 

 5 87 

 10.51 

 17.16 

 12.27 



11.88 



37- 

 inch. 



5.00 

 5.25 

 9.10 

 6.12 

 6.22 

 4.80 

 3.92 

 5.25 

 8.58 

 6.11 



5.94 



Per cent 

 total 

 stand. 



83.6 

 64.7 

 46.4 

 68.5 

 87.6 

 26.9 

 71.6 

 83.4 

 72.1 

 47.4 



64.5 



1 Estimates furnished by T. T>. Woodbury, assistant district forester, San Francisco, Calif. If the stump- 

 high diameters were used instead of those'breast high, a large number of trees would be included in the 

 24-inch class, as many trees measuring 22 inches and over, breast high, would come within the 24-inch class 

 if measured on the stump. 



