HUNDESHAGEN S METHOD. 321 



normal series of age classes. The normal growing stock is 

 obtained by adding up the volumes given in a suitable yield 

 table; by the real growing stock Hundeshagen understands 

 that, which is actually standing in the forest. 



In applying the method, Hundeshagen does not ask for a 

 general working plan, except for a limited number of years ; 

 he is satisfied with determining the species, sylvicultural 

 system, general lines of management, the rotation and general 

 rules for the grouping of the age classes ; he leaves it to the 

 manager to select the woods for cutting from time to time, say 

 every five or ten years. 



As the yield is determined by the growing stock which 

 happens to exist, and as this practically changes from year to 

 year, it would, theoretically speaking, be necessary to re- 

 measure the growing stock every year, but as the changes are 

 slow, Hundeshagen considers it sufficient, if the re-measuring 

 is done once every 20 or 30 years. 



Hundeshagen determines, in the manner above described, 

 only the final returns ; he adds the intermediate returns, 

 estimated in a summary manner, or calculated according to 

 average data obtained locally. 



h. Meritx of the Mpthdd. 



The principal assumption of Hundeshagen is not quite 

 correct; at any rate there is no justification for maintaining, 

 that the real yield bears the same proportion to the real 

 growing stock as the normal yield to the normal growing 

 stock, because the rate of increment is not determined by the 

 quantity of growing stock, which stands in a forest. On the 

 contrary, a large growing stock, consisting of defective old 

 woods, may give a small increment, while a small growing 

 stock, consisting of vigorous young woods, may show a large 

 increment. 



The method, if applied rigorously, may lead to absurd 

 measures, just in the same way as the Austrian method ; 



YM. Y 



