FOR WHOLE TREES. 



31 



200 



3OO 



400 



500 



600 



AGE OF TREE-YEARS 



FIG. 2. A diagram obtained directly from Fig. 1. The black points on the bound- 

 ary show the per cent of total number of trees falling within periods of twenty-five 

 years. For instance; the ordinate marked (a) indicates that nine per cent of all of 

 the trees measured and identified as "bull pine" (immature) fell between 150 and 175 

 years. Ordinate (a) was plotted directly from Fig. 1, as indicated in that figure. 

 All other ordinates were plotted in a similar manner. 



1OO 



100 



2OO 



3OO 



4OO 



500 



6OO 



AGE OF TREE-YEARS 



FIG. 3. A diagram obtained directly from Fig. 2, and based upon the per cent of 

 identifications of "bull pine" (immature) and typical yellow pine (mature), occurring 

 at different ages. The lapping over of the two portions of the diagram indicates the 

 ages at which maturity is reached ; also, the per cent of total number of trees matur- 

 ing at different ages. 



