FOR BUTT LOGS. 



87 



Curves showing average total volume in board feet contained in 16' butt logs 

 from mature western yellow pine trees of different diameters breasthigh. 



900 



600 



LJ 5OO 



;:;;:::: :::: r :' ::::;:::::::::: ::;.y: ::;!:, :h ;:!:;; ::!::;::: 



C 2O 22 24 2C 28 3D 32 34 36 38 4O 42 44 

 DSAMETER BREASTHIGH INCHES 



FIG. 96. Total volume in board feet as shown by the Spaulding Log Rule. 



