METHOD OF FORM FACTORS. 



63 



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S 



in words : "the mean height is equal to the total volume of 

 cylinders erected over the spot where the measurement of the 

 diameters is taken, divided by the total basal area." This 

 formula holds good in the case of the several trees of one 

 class, as well as for calculating the mean height of several 

 classes, or of a whole wood. 



MEANS OF FORM FACTORS. 



TO KUNZE'S FORM FACTORS. 



