202 



FELLING AND 



* This tree was evidently not a good sample tree, as its length of useful 

 timber is less than it should be. 



The following figures show how the volume of the wood was 

 ascertained. 



316 



3*204 



Total number of trees per acre = 316. 



Total volume under bark = 3,204 cubic feet. 



Average volume per tree = 10 cubic feet. 



If it is impossible to find a sample tree of exactly the size 

 of the inch-class, one as near as possible must be chosen and 

 cut. In this case a slight allowance must be made in the 

 volume of the sample tree. Thus, if a 9-inch tree cannot be 

 found, but one 9-2 or 9-3 inch is found and cut, its volume may 

 be reduced by i cubic foot before the calculation of the volume 

 of the inch-class is made. In the same way, if a tree 8-8 or 

 8-7 is found, its measured volume may be increased by from 



