238 



GOVERNMENT REGULATION AND WORKING PLANS 



which we will presume totals 800 M, will be deducted from the old wood. 



5 400 

 Thus 6,200 M - 800 M = 5,400 M, -^ = 90 M per year, plus 



growth. 



(C) Suppose the volume of the old wood equals 3,300 M and the 



volume of the average wood equals 4,700 M. Here the average wood is 



in excess of the normal ratio, so it is determined where one or more of 



the largest average wood diameter classes can be transferred to the 



old wood for immediate cutting. If it were found that the 16-inch 



diameter class, which we will presume totals 600 M, can be added to the 



old wood, the volume will be 3,300 M plus 600 M which equals 3,900 



3 900 

 M and the cut ' _ equals 65 M, plus growth. 

 oU 



Young wood 



D.B.H. 

 inches 



Number 

 trees 



Total 



volume, 



board 



feet 



Not calipered nor 

 computed 



Average wood 



D.B.H. 



inches 



Totals. 



10 

 11 

 12 

 13 

 14 

 15 

 16 



Number 

 trees 



Total 



volume, 



board 



feet 



Completely 

 calipered 

 and 

 computed 



Old wood 



D.B.H., 

 inches 



3,000 M 



Number 

 trees 



Total 



volume, 



board 



feet 



17 

 18 

 19 

 20 

 21 



22 

 23 



Completely 

 calipered 

 and 

 computed 



5,000 M 



After studying the application of this method of 1883 for 25 years, 

 Schaeffer^' decided that the results were very satisfactory; it has 



>« Possibility des Futaies Jardinfes, A. Schaeffer, pp. 321-326. Revue des E. et F., 

 1908. 



