126 



A MILL SCALE STUDY OF WESTERN YELLOW PINE. 



1100 



10OO 



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



DIAMETER BREASTHIGH INCHES 



FIG. 203. Curves showing "mill over-run" for butt logs from immature* trees of 

 different diameters 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'. 



18 20 22 24 



26 28 30 32 34 36 

 DIAMETER BREASTHIGH INCHES 



38 40 42 



FIG. 204. Curves showing per cent of "mill over-run" for butt logs from imma- 

 ture trees. 



100 (A' AS) 100 0' 



As' 



As' 



= 0p'. 



