21 



Sample Plot No. 1 (Government Plot No. 4) Concluded. 



Average height, 1905, 50 feet. 

 Average height, 1914, 55 feet. 



Summary of Data. 

 Total board feet to acre, 1905, . 

 Total board feet to acre, 1914, . . . . 

 Total gain in board feet per acre, 

 Current annual gain in board feet per acre, 



29,212 



37,716 



8,504 



945 



Sample Plot No. 2 (Government Plot No. 5}. 



Area, 1 A acre; age, forty-three years. 



