QUANTITY INCREMENT PER CENT. 



191 



III. OR MIDDLING QUALITY, ACCORDING TO WEISE. 

 Fagots. 



(4) The mean annual increment, for final and intermediate 



returns, culminates about the year 60, when it is 

 equal to the current annual increment. 



(5) Both the current and mean annual increment of final 



and intermediate returns culminate later than in the 

 case of final returns only. 



(6) The increment per cent, forms a falling series in each 



case. 



(7) The increment per cent, of final yield for the year 40, when 



the mean annual increment culminates, should be 



