URIC'H S METHOD. 



57 



example, but they have been multiplied by ten all round, in 

 order to obtain a larger number of trees. 



h. Uriah's MetJwd. 

 In order to avoid the inaccuracy caused by rounding off 

 fractions of sample trees, Urich proposes to arrange the 

 trees in such groups, that each sample tree represents 

 the same number of trees. For this purpose he places the 

 same number of trees in each group and then calculates 

 the arithmetical mean sample tree for each. For the rest 

 he proceeds on tlie same lines as Draudt, so that he obtains 

 the volume of the whole wood by the same formula, 

 namely : — 



K=,-X«. 



ACCORDING TO URICH'S METHOD. 



