124 



A MILL SCALE STUDY OF WESTERN YELLOW PINE. 



5000 



4500 



4OOO 



3500 



3000 



2500 



2OOO 



1500 



1000 



500 



18 



22 



24 



26 28 30 32 34 



DIAMETER BREASTHIGH INCHES 



FIG. 199. Curves showing -'mill over-run" for immature trees of different diam- 

 eters breasthigh. A = Volume in board feet actually sawed out at mill. As = Volume 

 in board feet as shown by the Spaulding Log Rule. O "Mill over-run" = A As. 



7O 



60 



50 



40 



10 





18 



2O 



22 



24 



38 



40 



42 



26 28 3O 32 34 36 



DIAMETER BREASTHIGH INCHES 

 FIG. 200. Curve showing per cent of "mill over-run" for immature trees. 



100 (A As) 100 



As 



As 



= 0p. 



