FOR WHOLE TREES. 



63 



Curves Showing Average Value per Tree and per 1,000 Board Feet for 

 Mature Western Yellow Pine. 



130.00 



26 28 3O 32 34 36 

 DIAMETER BREASTHIGH INCHES 



38 4O 



42 



FIG. 69. Curve B x shows the average value, in dollars and cents, of mature trees 

 of different diameters breasthigh. B^ = Aval^ -f Bvali -j- Cvah. Curve .015A]. shows 

 the increase in value due to quantity increment. Curve Qi shows the increase in value 

 due to quality increment. 



Q l = B,. 



