238 



GOVERNMENT REGULATION AND WORKING PLANS 



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



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 



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



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

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



36 Possibilite des Futaies Jardinees, A. Schaeffer, pp. 321-326. Revue des E. et F., 

 1908. 



