19 



NOTES TO TABLE 13. 



Under gn'en conditions of growth, a tree will show a certain 

 diameter at a given age. The relation between age and diam- 

 eter at 4 feet from ground (breastheight) is given on table 13. 



The diameter of a poplar, 4 feet from ground, grows at the 

 rate of 3 inched in 20 years from its 40th to its lOOth year. 

 Thereafter the rate of diameter growth becomes gradually 

 less, being about 2 inches in 20 years at the age 200. 



This rule can be considered to be correct for average condi- 

 tions of growth in Wratem North Carolina. 



