56 



A MILL SCALE STUDY OF WESTERN YELLOW PINE. 



Grades Sawed From Immature Trees of Different Diameters Breast- 

 liigli, Expressed in Per Cent of Total Sawed Out. 





18 20 22 24 26 28 3O 32 34 36 38 4O 42 

 DIAMETER BREASTHIGH INCHES 



100 Av 

 FIG. 54. High grades. = Ap. 



18 20 22 24 26 28 3O 32 34 36 

 DIAMETER BREASTHIGH INCHES 



40 42 44 



FIG. 55. Intermediate grades. 



100 Bv 



18 20 22 24 26 28 3O 32 34 36 38 4O 42 44 



DIAMETER BREASTHIGH INCHES 



FIG. 56. Low grades. Cp. Ap -f Bp -f Cp 100%. 

 A. 



