GS 



A MILL SCALE STUDY OF WESTERN YELLOW PINE. 



NO. OF TREES AVERAGED FOR EACH POINT 

 READING FROM LEFT TO RIGHT 



TOTAL NO. OF TREES - 5O2 S 



4000 



35OO r- 



2500 ~ 



2000 



1500 



1000 



500 



2O 22 24 26 28 3O 32 34 



DIAMETER BREASTHIGH INCHES 



38 40 



FIG. 76. Total volume in board feet as shown by the Spaulding Log Rule. 



