72 



BULLETIN 2*12, U. S. DEPARTMENT OF AGRICULTURE. 



Table 20. — Volume in board feet of cypress based upon breast-high diameters, by Doyle 

 and the tivo-thirds log rule (South Carolina) — Continued. 



Diameter 

 breast 

 high. 



Doyle 

 rule. 



"Two- 

 thirds" 

 rule. 



Total 

 height. 



Used 

 length. 



Length 

 of log. 



Stump 

 height. 



Diameter 

 (inside 

 bark) 

 of top. 



Basis 



Incites. 

 41 

 42 

 43 

 44 

 45 

 46 

 47 

 48 

 49 

 50 



Bd.ft. 

 1,683 

 1, 752 

 1,821 

 1,890 

 1,959 

 2,025 

 2,092 

 2,160 

 2, 230 

 2,300 



Bd.ft. 

 1,424 

 1,480 

 1,538 

 1,591 

 1,649 

 1,701 

 1,759 

 1,815 

 1,872 

 1,930 



Feet. 

 105 

 106 



107 

 108 

 108 

 109 

 110 

 111 

 111 

 112 



Feet. 

 61 



62 

 62 

 62 

 63 

 63 

 63 

 63 

 64 

 64 



Feet. 



19 

 18 



Feet. 

 4.0 

 4.0 

 4.0 

 4.0 

 4.1 

 4.1 

 4.1 

 4.1 

 4.1 

 4.1 



Inches. 

 21.7 

 22.0 

 22.3 

 22.6 

 22.9 

 23.1 

 23.4 

 23.6 

 23.9 

 24. 1 



Trees. 

 2 

 2 



19 

 18 

 16 

 18 

 18 



5 

 2 

 1 

 1 

 3 











265 



Table 21. — Volume of merchantable cypress in board feet by the Scribner and Doyle rules 



for cypress in Louisiana} 



Diam- 



Diam- 



Volume. 





Mer- 







Diam- 

 eter 



inside 

 bark 



of top. 





outside 

 bark at 

 20 feet. 



eter 







Total 



chant- 



Length 



Stump 



Basis 



breast- 

 high. 



Scrib- 

 ner. 



Doyle. 



height. 



able 

 length. 



of log. 2 



height. l 



trees. 







Board 



Board 















Inches. 



Inches. 



feet. 



feet. 



Feet. 



Feet. 



Feet. 



Feet. 



Inches. 





8 

 9 



12.8 

 14.2 



50 



20 

 40 



65 



70 



33 

 36 







5.5 

 6.2 



2 



33 



3.8 



10 

 11 



15.6 

 17.0 



95 

 140 



60 

 80 



75 

 79 



40 

 43 







6.9 

 7.6 



1 



56 



3.7 



12 



18.4 



190 



110 



84 



47 



28 



3.9 



8.3 



6 



13 



19.8 



240 



140 



88 



50 



24 



3.5 



9.1 



4 



14 



21.1 



290 



180 



91 



54 



31 



3.7 



9.8 







15 



22.4 



350 



230 



95 



57 



22 



3.6 



10.5 



7 



16 



23.8 



410 



280 



98 



59 



23 



3.7 



11.2 



8 



17 



25.1 



490 



340 



101 



62 



24 



3.7 



11.9 



5 



18 



26.3 



560 



400 



103 



64 



14 



3.5 



12.6 



2 



19 



27.6 



650 



4S0 



105 



66 



33 



3.9 



13.3 



4 



20 



28.8 



740 



560 



107 



67 



33 



3.2 



14.0 



1 



21 



30.0 



840 



660 



109 



69 



34 



3.2 



14.6 



1 



22 



31.2 



950 



770 



111 



70 



20 



4.2 



15.3 



2 



23 



32.4 



1,080 



890 



113 



71 



25 



3.0 



15.9 



1 



24 



33.6 



1,210 



1,020 



114 



72 



39 



3.5 



16.6 



1 



25 

 26 



27 



34.7 

 35.9 

 37.1 



1,350 

 1,510 

 1,670 



1,170 

 1,330 

 1,500 



116 

 117 

 118 



73 

 73 

 74 







17.3 

 17.9 

 18.6 



1 







35 



3.5 



28 



38.2 



1,850 



1,680 



119 



75 



30 



5.0 



19.3 



2 



29 



39.4 



2,020 



1,870 



120 



75 



?3 



4.0 



19.9 



1 



30 



40.5 



2,200 



2,060 



121 



70 



34 



3.5 



20.6 



1 



55 



1 Based upon measurement of 55 trees and must be considered rather as tentative than final. Tables 

 for South Carolina are generally applicable. 



2 Uncurved. 



Referring to Table 18, for example, one learns that a 3-log tree, with a butt log 18 

 inches in diameter at the upper end contains 400 board feet of merchantable lumber; 

 also that such trees are cut on an average to a top diameter of 12 inches measured inside 

 the bark. The tables are based upon full scale of sound timber. Another form of 

 measurements (Table 20) gives the volume of trees of a specified breasthigh diameter 

 by the Doyle and two-thirds log rules in South Carolina; also the average total height 

 and length, average length of log, stump height, and diameter to which the trunk is 

 utilized. 1 



Although based upon insufficient measurements, Table 21 is included here for 

 reference and comparison. It will be found useful for rough approximation for which 



1 Since these measurements were taken, utilization in logging has advanced considerably, so the figures 

 are likely to be too low in total volume and used length and too high in top diameter and stump height. 



