TABLES OF MEASUIIKMENTS. 



113 



"O 80 417 60 80 100 120 /40 ISO /SO 200 220 240 



AGE OF D/SK 



Fio. 30.— Diafjram showing diuiueter ^rowtU ol" (luiuiuaut tribes at various heights from gruuud in Pennsylvania. 



"0 20 40 60 80 100 JfJ^^ g/gj^^f^ ^^^ '^^ 200 220 240 



Fui. :i7.— Diagram .showing diameter growth of codominant trees at rariuus heijihts from j;roiiuil in Pennsylvania. 



20233— No. 2:J 8 



