THE EASTERN HEMLOCK. 



37 



Table 20. — Volume of hemlock bark in stacked cords — Vermont. 1 



Diameter 



Volume of 



Diameter 



Volume of 



breast-high. 



bark. 



breast-high. 



bark. 



Inches. 



Cord. 



Inches. 



Cord. 



8 



0.03 



21 



0.25 



9 



.05 



22 



.28 



10 



.06 



23 



.31 



11 

 12 



.07 

 .08 



24 

 25 



.34 

 .37 



13 



.09 



26 



.40 



14 



.10 



27 



.43 



15 



.12 



28 



.46 



16 



.14 



29 



.50 



17 



.16 







18 



.18 







19 



.20 







20 



.22 







1 From "Hemlock in Vermont," by A. F. Hawes, State forester; Vt. Agr. Exp. Sta. Bulletin 161 (Janu- 

 uary, 1912), p. 8. The table was constructed by "subtracting the volumes of the trees inside the bark from 

 their volumes outside the bark, and multiplying by 0.4, on the assumption that 40 per cent of an average 

 stacked cord of bark is solid bark." The accuracy of this factor (taken from Schenck's "Forest Mensura- 

 tion," 1905, p. 14) was borne out by investigations of a few piles of bark. 



The following taper tables give diameters inside bark at different 

 heights for average hemlock trees of various sizes in the Lake States 

 and Southern Appalachians. The distances from the ground are in 

 units of 8.15 feet above a 2-foot stump. These units represent the 

 half of a 16.3-foot log. The practical use of these tables is to permit 

 scaling trees of given size in terms of any desired log rule, but they 

 also serve as a basis for comparing hemlock with other species in regard 

 to form. The tables were prepared from existing measurements by 

 W. B. Barrows. 



Table 21. — Diameters inside bark at different heights above the ground for trees of different 

 sizes, based on measurements of 614 trees in Wisconsin ( Marinette and Vilas Counties) 

 and Michigan (Gogebic County). 



[The heights above ground represent 16.3-foot logs and half logs, plus a stump height of 2 feet.] 





30-foot trees. 



40-foot trees. 



50-foot trees. 



60-foot trees. 



Diameter 

 breast- 









Height above ground — ft 



et. 









high out- 

 side bark. 



10.15 



18.3 



10.15 



18.3 



26.45 



10.15 



18.3 



26.45 



34.6 



10.15 



18.3 



26.45 



34.6 



42.75 



50.9 











Diame 



ter inside ba 



rk — in 



3hes. 









Inches. 

 4 



3.0 

 3.9 



4.7 

 5.6 

 6.4 

 7.4 

 8.1 



1.4 

 2.0 



2.5 

 3.2 

 3.9 

 4.5 

 5.1 



3.1 

 3.9 



4.8 

 5.7 

 6.6 

 7.5 

 8.3 



9.2 

 10.0 

 10.9 

 11.8 

 12.7 



2.4 

 3.1 



3.9 

 4.7 

 5.3 

 6.0 

 6.8 



7.5 

 8.2 

 8.9 

 9.6 

 10.3 



1.6 

 2.1 



2.6 

 3.1 

 3.6 

 4.1 

 4.6 



5.1 

 5.7 

 6.2 

 6.8 

 7.3 























5 























6 



5.3 

 6.1 

 6.9 



7.7 

 8.5 



9.3 

 10.1 

 10.9 

 11.6 

 12.3 



13.0 

 13.8 

 14.5 



4.5 

 5.3 



6.1 

 6.8 

 7.6 



8.3 

 9.0 

 9.8 

 10.5 

 11.2 



11.9 

 12.6 

 13.3 



3.6 

 4.1 

 4.8 

 5.4 

 6.1 



6.6 

 7.3 



7.8 

 8.5 

 9.0 



9.7 

 10.2 

 10.8 



2.4 

 2.8 

 3.2 

 3.6 

 4.0 



4.4 

 4.8 

 5.2 

 5.6 

 6.0 



6.4 

 6.9 

 7.3 















7 



8 



9 



10 



11 



6.0 

 6.8 

 7.6 



8.5 



9.2 

 10.0 

 10.8 

 11.6 

 12.5 



13.3 

 14.1 



14.8 

 15.7 

 16.4 



17.2 

 17.9 



5.5 

 6.2 

 6.9 



7.8 



8.5 

 9.5 

 10.1 

 10.9 

 11.6 



12.5 

 13.2 

 14.1 

 14.9 

 15.7 



16.5 

 17.3 



4.7 

 5.3 

 6.1 

 6.8 



7.5 

 8.3 

 9.0 

 9.7 

 10.4 



11.1 

 11.8 

 12.5 

 13.2 

 13.9 



14.7 

 15.4 



3.6 

 4.2 



4.8 

 5.4 



6.0 

 6.6 



7.2 



7.8 

 8.4 



9.0 

 9.5 

 10.1 

 10.7 

 11.3 



11.9 

 12.5 



2.4 

 2.9 

 3.3 



3.7 



4.1 

 4.6 

 5.0 

 5.5 

 5.9 



6.4 

 6.8 

 7.3 



7.7 

 8.2 



8.6 

 9.0 



1.3 

 1.5 

 1.7 

 2.0 



2 2 



12 







2 4 



13 







2.6 

 2 9 



14 







15 







3 2 



16 







3 6 



17 













3 7 



18 













4 1 



19 













4 4 



20 





















4 7 



21 





















4 8 



22 





















5 

























