190 



THE INCREMENT. 



YIELD TABLE FOR ONE ACRE OF A SCOTCH PINE WOOD, 



Timber and 



timber down to 3 inches diameter, and the second for timber 

 and firewood, in each case for one acre ; the data refer to the 

 volumes above ground only. 

 The second table shows that 



(1) The current annual increment, for final returns only, 



culminates about the year 25. 



(2) The mean annual increment, for final returns only, 



culminates about the year 40, that is to say, when 

 it is equal to the current annual increment. 



(3) The current annual increment, for final and inter- 



mediate returns, culminates about the year 35. 



