552 Forestry Quarterly 



attainable. He tries to bring out the fact that the relation of the 

 portion of the stock removed in the thinnings every decade to the 

 total stock at the time of thinning is the best measure of a prop- 

 erly managed stand under similar conditions. He advises to use 

 the data of these yield tables for the purpose of control of felling 

 budgets rather than the opinions and estimates of the manager. 

 With this in view, he has from these yield tables figured and 

 tabulated the percentage of removal of the growing stock from 

 decade to decade that is necessary to secure the results of the 

 yield table. 



We give a few sample of the calculations on the heavily thinned 

 stands, which are of interest also in other ways. 



Volume Per Cent Removal 



The results of Wimmenauer's management vvere briefed in 

 Forestry Quarterly, YI, p. 432. 



Uber nachhaltige Masseticntnahmen ohne Fldchenverrechnung. Forst- 

 wissenschaftliches Centralblatt, January, 1915, pp. 23-26. 



The issuance of a circular by the Swiss 



Nurse Tree Forest Inspector, advising an increase of 



vs. Selection selection forest, brought out a considerable 



Method amount of discussion by advocates for and 



against the selection forest. As usual, these 



discussions, according to Meyer, were somewhat in the air for 



lack of precise definition of where the limit between selection 



and nurse-tree or shelterwood (Femelschlag) lies. He cites the 



language of a working plan, in which natural regeneration and 



nurse-tree method "in the widest sense of that term" is pre- 



