102 



A MILL SCALE STUDY OF WESTERN YELLOW PINE. 



Grades Sawed From 16' Butt Logs of Immature Trees of Differ* at 

 Diameters Breasthigh, Expressed in Per Cent of Total "Sawed Out." 



18 2O 22 24 26 28 3O 32 34 36 38 4O 42 



DIAMETER BREASTHIGH-INCHES 



FIG. 139. High grades. r= Ap'. 



8 



2O 



22 24 26 28 3D 32 34 36 

 DIAMETER BREASTHIGH-INCHES 



100 Bv' 

 FIG. 140. Intermediate grades. Bp\ 



38 



40 



42 



2O 



22 



24 



26 28 30 32 34 36 

 DIAMETER BREASTHIGH INCHES 



100 <7i/ 



38 



40 42 



