32 



In tbe preceding example, in applying Draudt's metliod, the 

 trees respectively of the four highest girth-classes being separately 

 very much less than Z (75), are lumped up together ■ for the 

 purpose of the valuation. 



To complete illustration of Urich's method, let us suppose that 



we have selected and felled ten sample trees of the respective 



average girth, and that they furnish the following figures : — 



Total basal area of the 10 trees . 

 Yield in timber „ 



„ „ fire-wood „ 



„ „ faggot-wood „ 



Then^_ 617-223 _ 



a 11-62 — 53"]j and the contents of the whole crop 



are- 

 Timber = 98-53 X 531 = •5,232 solid eft. 

 Fire-wood = 856-40 ^ 53-1 = 45,475 stacked c. ft. 

 Faggot-wood = 84-7 x 53-1 = 4,498 „ „ 



The completion of the valuation by Hartig's method is effected 

 in the following tabular statement:— 



11-62 sq.ft. 

 98-53 solid c. ft. 

 856-40 stacked c. ft. 

 84-70 „ 



Or we may use the formula C = A HP; whence total contents 



631-6 



= 617"2a3 X ~= 38,984 cubic feet. 



