390 



APPENDIX Y. 

 General WowKiNf; I'f.an iihawn 



ACCORDTXO 



Itotatidii. 



Calculation of the Yield. 

 This is clone according to the formula given on page 318 : 



Annual yield = !,,,,, + ''"'^ ~ ^""'■""" 

 a 



The real increment, J,,.„,, 

 The real growing stock, &..,„, 

 The normal growing stock, G„ 



The surplus of growing stock 



= 102,696 cubic feet. 

 =: 8,939,771 „ 

 = 7,456,200 „ 



= 1,483,571 cubic feet. 



Assuming, that this surplus is to l)e removed in the course of 50 

 years, the yield would he — 



1,483,571 



Annual yield = 102,690 + 



or during the first 10 years 



50 



102,096 + 29,671 



= 132,367, 

 1,323,670 cubic feet. 



