DRAUDT S METHOD. 55 



neglecting '50 and under, tcaldng care, that the total number 

 of sample trees is as nearly as possible correct. The result 

 of this operation is, that the original proposition is no longer 

 absolutely maintained ; in other words, the volume of the 

 actual sample trees does no longer represent the true value 



F X jj 

 100 * 



To avoid this inaccuracy, Draudt introduces the basal 



area of the whole wood = S and of the sample trees = s, by 



Calculation of Volume according to Dbaudt"s Method. 

 Aiea=10 Acres. 



and 



fxl 



This formula is used to calculate, not only the whole volume, 

 but also that of timber and firewood separately. 



