METHOD OF FORM FACTORS. 



61 



volume of each group calculated separately. By adding 

 together the volumes of the groups, the volume of the whole 

 wood is obtained. This makes the method more laborious 

 than those of Draudt and Urich. 



The example on pages 58 and 59 will further explain the 

 method. 



3. Determination of Volume hi/ means of Form Factors and 

 Volume Tables. 



Instead of felling and measuring sample trees, their volume 

 can be ascertained by means of form factors, or taken from 

 volume tables. This applies to all the methods given above. 

 In all these cases the volume is ascertained according to the 

 general formula : — 



V = S X H X F. 



Means of Form Factors. 



