FOREST COMMISSIONER S REPORT. 



129 



Less than 2 ,000 feet board measure, or 550 cubic feet, ^/i';;';;,omrae 

 is supposed to be left on the ground. After twenty ^^ "' **''''^*'- 

 years succeeding; a cut, this timber would grow into 873 

 cubic feet or 3,335 board feet, an average yearly growth on 

 the land of sixteen cubic feet or seventy-four feet })oard 

 measure. At compound interest the yield is in the one case 

 2.3 per cent, in the other 3.0. This difference in rate is due 

 to the fact that the larger a tree is the larger the scale it gets 

 for each cubic foot of its contents. 



Acre after Cutting to a 10-inch Standard. 



Diameter- 

 inches. 



s 



■a -A 



I 



o 



O— ' CO 



S o 3J 

 O OJ s 



Same Twenty Years After. 



Diametei'- 

 inclies. 



I 



0) 





3 <u 

 O (D 2 



5 and it. 



6 and 7. 



10 and 11 



7. .5-9 



6 and 7 . 



290 

 63 

 15 



368 



1,078 

 189 



1,267 



Yearly growth in cubic feet, 8.1; at rate of 3% compound interest. 



Yearly growth in feet board measure, 38; at rate of 4.7% compound interest. 



Let US now suppose the cut to be to a standard of |[n|Yepre9. 

 ten inches breast high. 205 cubic feet in this case ^^^ growth, 

 grows in twenty years to be 368, while 510 board feet grows 

 into 1,207. The average yield is 8.1 cubic feet, being at the 

 rate of three per cent compound interest — in board feet 38, 

 at 4.7 per cent. Comparative results here are too important 

 to be allowed by any means to escape. The little table 

 annexed will, it is hoped, receive careful examination. The 



Average Growth during Twenty Years after Cutting of Land. 



Cut to fourteen inches 

 Cut to ten inches 



9 



