42 BULLETIN 55, U. S. DEPARTMENT OF AGRICULTURE. 



Table 2'd.— Volume groivth, in cubic feet, of balsam Jir in Maine, on the basis of age 



\jip, (yeai's). 



Volume. 



Growth in 

 volume 

 every 5 

 years. 



Annual 

 growth ill 



volume 

 within 5- 

 year period. 



Co 



8.81 

 10.64 

 12. 55 

 14.50 

 16. 51 

 18.60 

 20.73 

 22.90 







70 



1.83 

 1.91 

 1.95 

 2.01 

 2.09 



0.366 



75....: 



.382 



80 



.390 



85 



.402 



90 



.418 



95 



2.13 



.426 



100 



2.17 ! .434 







TAPER. 



Tables 24 to 29 show the taper of balsam fir in different situations 

 in New York and JMaine, expressed in inches and in per cent of the 

 diameter breast high. The diameter breast high inside bark is taken 

 as 100, and the diameters inside bark at 10, 20, 30, etc., feet from 

 the ground expressed as fractions. 



These taper tables furnish a basis for the construction of volume 

 tables in any log scale or m cubic measure, and serve in general to 

 indicate the development of the bole under various conditions of 

 growth. Thus, they sh6w the more spmdling development of balsam 

 fir in the swamp than on either the flat or hardwood slope, and the 

 better development, on the whole, in Maine than in New York. 



Table 24. — Taper of balsam fir in New Yorh on swamp. 

 [Expressed in per cent of the diameter inside hark breast high.) 



Diameter breast high (inches). 



Height above ground (feet). 



4.5 



10 



20 



30 40 



50 



60 









20-foot trees. 



2 



100 

 100 

 100 



72.2 

 74.1 

 70.3 











3 











4 







1 











1 







30-foot trees. 



2 



100 

 100 

 100 

 100 

 100 

 100 



84.2 

 85.7 

 86.5 

 89.1 

 87.5 

 89.2 



52.6 

 57.1 

 56.8 

 58.7 

 .58.9 

 60.0 











3 











4 











5 











6 











7 



























40-foot trees. 



2 



100 

 100 

 100 

 100 

 100 

 100 

 100 

 100 



89.5 

 89.3 

 91.9 

 91.5 

 91.1 

 92.3 

 92.0 

 91.8 



68.4 

 71.4 

 73.0 

 72.3 

 73.2 

 75.4 

 74.7 

 72.9 



42.1 

 42.9 

 43.2 

 44.7 

 46.4 

 46.2 

 46.7 

 47.1 









3 .. 









4 









5 









6 









7 









s 









9 









1 





