DEAUDT S METHOD. 



53 



trees, the proportion of these to the total number of trees is 



79 



= ~- = -op. By multiplying each term in the above 

 equation by this coefficient, the following equation is ob- 



tained : 



Vx 'op = v l X H! X ' 



'op+v s xn 3 X'op + . 



Here, v l xn l X'op represents the volume of the sample trees 

 in the first class, v 2 Xn 2 X 'op that of second class, &c. If the 



THE ARITHMETICAL MEAN SAMPLE TREE OP THE WHOLE WOOD 

 IINE WOOD, 70 YEARS OLD. 



