MILL OVER-RUN. 



127 



38 40 42 44 



DIAMETER BREASTHIGH INCHES 



FIG. 205. Curves showing "mill over-run" for butt logs from mature 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. Oi' = "Mill 

 over-run" = A/ As/. 



20 22 24 26 28 3O 32 34 36 38 



DIAMETER BREASTHIGH INCHES 



40 42 



FIG. 206. Curves showing per cent of "Mill over-run" for butt logs from mature 

 trees. 



100 (A/ -As/) = _ 100 O/ = 

 As/ As/ 



