386 



APPENDIX lY. A. 



Calculation of Yield for tiii^ I. I'hkioi), isss— ii 



j- See next page. 



* The calculation is made as follows : — Uegeneration ])erinil = jo years. 

 I\Ican volume per acre of woods in first period = 4,123 cubic feet. Kcmain, 

 when seeding cutting has been made = 4,123 X •<> = 2,474 cubic feet. It is 

 assumed that the 2,474 cubic feet are cut away in annually equal shares of J^th, 



that is to say = ■ ' = 217-4 cubic feet annually ; hence the ten coupes, 



160i r 

 of 100 

 c(iual lo 

 C'oiipe X. 

 2,474 



' acres of area each, will have per acre at the end of ihe period volumes 



Coupe IX. 



2,474 -2:il:^ 

 10 



Coiipe VIII. 



2 474 

 2 474_nil:lX2-...2,474-^',,/ x 8 

 10 



Coupe II. 

 !,47- 

 10 



Coupe I. 



2,474-2dIix9 



10 

 = 247-4 



Total = l|j:!l5 X ""^ (2,474 + 217-1) = 21,792 cubic feet. 



