09 



second deduction made for the bark, because the inclusion of the two 

 percentages in one deduction would be making a double deduction 

 for the bark on the top and stump. This point becomes important, 

 however, only in the smaller trees where the percentages of waste 

 are high. For instance, for a 12-inch tree a bark deduction of 24 

 per cent and a top and stump deduction of 25 per cent added by the 

 wrong method would give a total deduction of 49 per cent, whereas 

 by first deducting 25 per cent for top and stump and then deducting 

 24 per cent of the remaining 75 per cent for bark, the bark deduction 

 would be 18 per cent of the total volume and the total deduction 

 only 43 per cent. 



Tables 20 and 21 give taper figures for the Black Hills; Table 22 

 gives these for California. Table 21 shows diameters outside the bark. 

 A comparison of Tables 20 and 22 shows why the volumes in the two 

 regions are so radically different. All heights are combined and the 

 figures represent the characteristic developments of the two regions. 



Table 20. — Taper, Black Hills National Forest, South Dakota. 









[Diamete 



r inside bark.] 











Diameter 



breasthigh. 







Height 



, feet — 









Total 

 height. 



Basis. 



1. 



10. 



20. 



30. 



4-3. 



50. 



60. 



70. 



Inches. 



8 



Inches. 

 8.3 

 9.4 

 10.4 

 11.5 

 12.5 

 13.4 

 14.3 

 15.2 



!S! 



18.2 

 19.3 

 20.4 

 21.5 

 22.5 

 23.0 

 24.5 

 25.6 



Inches. 

 6.4 

 7.3 

 8.2 

 9.1 

 10.0 

 10.9 

 11.8 

 12.7 

 13. i : i 



Inches. 

 - 4.8 

 5.9 

 6.9 

 8.0 

 9.0 

 10.0 

 10.9 

 11.8 

 12.7 



Inches. 



Inches. 



Inches. 



Inches. 



Inches. 



Feet. 

 45 

 50 

 54 

 58 

 62 

 65 

 68 

 71 

 73 

 75 

 77 

 79 

 80 

 82 

 83 

 84 

 86 

 87 



Trees. 

 45 

 47 

 24 

 20 

 12 

 27 

 41 

 40 

 34 



32 j 



33 



47 { 

 38 | 

 24 j 

 12 j 

 10 j 



2 



3 



9 



4.5 



5.5 



6.7 



7.8 



8.9 



9.9 



10. 9 



1L8 



12.7 



13.5 



14.4 



15.3 



16.2 



17,1- 



18.0 



38.9 



19.9 











10 



3.9 



5.1 



6.3 



7.4 



8.4 



9.4 



10. 3 



11.2 



12.0 



13.0 



13.9 



14 9 



15.8 



16.8 



17.7 



18.7 









11 









12 



4.2 



5.4 



6.4 



7.2 



8.1 



9.0 



9.9 



10.8 



11.9 



13.0 



14.0 



15.1 



16.2 



17.2 



• 



13 



14 



15 



44 

 5.3 



11 



8.0 

 9.1 

 10.3 



11.3 



III 



14.7 



a 8 



9.8 

 10.9 



l(i 



17 



14 5 is fi 



18 



19 



20 



21 



22 

 23'.'.'.'.'.'.'.'.'.'. 



24 



25 



15. 5 



16. 3 

 17.3 

 IS. 3 

 19.2 

 20.2 

 21.1 

 22.1 



14.5 



15.4 

 16.2 

 17.2 

 18.1 

 19.1 

 20.0 

 21.0 



















491 







1 















[Oir. 127] 



