Periodical Literature. 279 



so as to secure a truly sustained annual (money) yield and to 

 avoid unsilvicultural cuttings — e.g. where low prices for wood 

 might otherwise necessitate an increased annual cut. 



Dr. Speidel of Stuttgart considered that such funds could best 

 be created by setting apart a portion of the income from the 

 sale of excess growing stock or of enforced cuttings (storm, 

 fire, etc.). The general discussion seemed to favor timber re- 

 serve funds rather than tnoney reserve funds. 



A. B. R. 



Die XXI Tagung des Deufschcn Forstzvirtschaftsrates in Trier, 1913. 

 Allgemeine Forst und Jagd- Zeitung, January, 1914, pp. 35-39. 



Oberforster Fischer reviews a disserta- 

 Increment tion by Gustav Baader on methods of de- 



in termining increment for purposes of forest 



Yield Regulation, organization. After reviewing the wa3'S 

 and means of increment determination in 

 the working plan instructions of the various States of Germany, 

 the author adds his own suggestions: for example, that in for- 

 ests managed under the shelterwood system with a long period of 

 regeneration (Femelschlagbetrieb) , the yield as figured for a cer- 

 tain stand should be increased, for site qualities II to IV, by 25% 

 where the period of regeneration is 20 years; by 35% where the 

 period of regeneration is 30 years ; the normal growing stock in 

 reproduction fellings=( initial growing stock-f-final growing 

 stock) Xhalf the regeneration periodX-5 to .6 (according to den- 

 sity). 



The reviewer is reminded of Strazeleckis' proposal* to calculate 



the normal growing stock by the formula : nV= — I Jl -f- -— ''I 



where r=rotation age; £ ^volume at ^ the rotation age; 



2 

 Vr=volume at the rotation age. 



Baader would regulate the yield, both final and intermediate, 

 by increment alone but this, the reviewer contends, is an insuffi- 

 cient basis: first, because of a lack of exact data — especially in 

 the case of intermediate yield (thinnings) ; secondly, because val- 

 ues as well as volumes enter into yield determination ; finally be- 



*Allgeineine Forst- und Jagd- Zeitung, 1884, p. 88, p. 316. 



