L58 



TABLE il -Total height and ''cubic volume of white oah for each decade of 



t he life of i he tree. 



* Volumes computed according to Schiffel: V = (.IliB .OOinh, wh-.v, 

 V = Volume. 



B = Basal area of cross section at breast height. 

 b = Area of cross section at middle height, 

 h = Total height of tree. 





Height, 



Volume, 





Height. 



Volume, 



Age. Years. 



Feel . 



Cu. Ft. 



\-.- ^ ears. 



Feel . 



Cu Ft. 



10 



10 



18.2 



. 003 



or, 1 



L30 



61 6 

 63 2 





20 



1 40 



36 846 



30 



25 5 

 31.8 



37 I 



. 178 

 .668 



1 I.V.I 



L50 



160 



65 



66 5 



07 . 9 



15 330 



40. . 



.".1 :i'. i7 



50 



170 



63 962 



00 



41.8 

 45 6 



_■ 590 



4 332 



ISO 



190 



69 



70 



75 mis 



70 



^7 220 



80 



49 2 



6.494 



200 



71 



loo 678 



90 



52 1 



9.482 



210 



71 8 



I L5 885 



100 



5 1 8 



13 4S1 



220 



72 1 



L28 076 



110. . 



r,7 2 

 59.4 



20.82] 

 23.522 



230 



'40 



72 8 



7:-! 



140 037 



120 



L56.658 



TABLE III. — Volume in board feet of Merchantable stem for even decades. 



Age, Years. 



Volume. 

 B. M. 



Age. Years. 



Volume, 

 B. M. 



Age. Years. 



Volume. 

 B. M. 



70 



SO 



90 



10 



lr, 

 40 

 65 



100 

 140 



130 



140 



150 



170 

 225 



2 75 

 335 



405 



4 00 



190 



200 



210 



220 



230 



240 



535 



030 

 725 



100 



160 



S30 



110 



170 



ISO 



955 



120 



1,095 



It must be remembered that these figures are based on trees growing 

 under an entire absence of management. Proper management should easily 

 materially increase tne rate of groAvth shown here. Even among these trees 

 there were many that were above the average rate here given. A curve 

 drawn for the maximum growth in diameter at the stump showed the follow- 

 ing comparison: 



