APPENDIX A. 



361 



during the next 20 years. The details have been omitted ; the total 

 volume amounts to 50,402 cubic feet. 



CALCULATION or YIELD FOR THE I. PERIOD, 1888-1907. 



* The calculation is made as follows : Regeneration period = 10 years. Mean 

 volume per acre of woods in first period = 4123 cubic feet. Remains, when seeding 

 cutting has been made = 4123 x '6 = 2474 cubic feet. It is assumed that the 2474 

 cubic feet are cut away in annually equal shares of y^th, that is to say = = 



1 f?A*1 ^ 



247 '4 cubic feet annually ; hence the ten coupes, of acres of area each, will 



100 



have per acre at the end of the period volumes equal to 



X. Coupe. 

 2474 



IX. Coupe. 



VIII. 



"To" 



ii. 



24,74 

 10 



= 247-4 



Total = 160 ' 15 x (2474 + 247 -4) = 21, 792 cubic feet. 



