80 



A MILL SCALE STUDY OF WESTERN YELLOW PINE. 



2.5O 



DIAMETER BPEASTHIGH INCHES 



FIG. 85. Curves obtained directly from Fig. 83, showing rates of growth per <lcr.-n!i- 

 of diameter breasthigh, of immature trees. These curves show rates for the In 

 ten per cent of trees, next to the lowest ten per cent, etc., to the highest ten per cent. 

 The average curve is plotted from averages of all rates for each diameter class. 



