A MILL SCALE STUDY OF WESTERN YELLOW PINE. 



20 



22 



24 



26 28 30 32 34 3 

 DIAMETER BREASTHIGH INCHES 



38 



40 



42 



FIG. 91. Curves showing increase in value per decade in dollars and cents 

 immature trees of different diameters breasthigh. These curves are constructed 

 plotting the increment of value from "B," the total value curve, corresponding to tl 

 increment of growth in diameter breasthigh shown in Fig. 83, for trees of diffei 

 diameters. 



2O 



22 



24 



26 28 3O 32 34 36 

 DIAMETER BREASTHIGH-HNCHES 



38 



40 



42 



FIG. 92. Curves showing per cent increase in value per decade of immature ti 

 of different diameters breasthigh. These curves are obtained by expressing the vali 

 shown in Fig. 91 in per cent of total value of trees of different diameters, or 

 curve A B 



X 100 = per cent increase in value, in dollars and cents, per decade of gr< 



curve B 



