758 Forestry Quarterly 



Building material, top diameter 18 cm, from 28-36 cm 

 class 828-507 1602 



1923 



Poles, top diameter 15 cw 872 



top diameter 12 cm, from 16-18 cm class 90 



962 



Workwood 3392 



Piilpwood (balance) 515 



3907 



Test measurements prove satisfactory for the top diameters 12-32 

 cm; only again for the 42 cm class errors, in spruce at least, are con- 

 siderable, but, the author states, such an assortment would rarely 

 be made for a whole stand, only for a few stem groups. 



Finally, the author constructs normal assortment jdeld tables 

 for pure, even-aged, normally stocked stands, with the aid of the 

 percentic basal area relation; one set of tables showing the per- 

 centic distribution from period to period (20 years) for 5 site classes 

 in the 6 size classes as made above, and another set showing the 

 distribution in detail from 4 to 4 cm, b.h.d. Diagrams also are 

 used to exhibit this percentic distribution of size classes at different 

 ages. 



While the common stand assortment tables are to be used for 

 estimating contents of stands in practical work, these normal 

 assortment tables are to be used for static and financial calcula- 

 tions. 



The author expresses the hope that the ready adaptability of 

 these tables will lead to their use not only in the practice of utiHza- 

 tion, but on the field of organization. "The exhibit and valuation 

 of the stock capital of a management class, in size and assortment 

 classes ; the determination of an economic rotation based on calcula- 

 tions ; the influence of thinning practice on volume and value yield 

 are questions which can be convincingly and clearly answered 

 only by paying attention to assortment volimies and assortment 

 values." 



We call special attention to this fruitful investigation! 



Mitteilungen der Schweizerischen Centralanstalt fur das forstliche Ver- 

 suchswesen, xi Volume, 2 Heft, pp. 153-272. 



