Periodical Literature. 323 



represent 36% of the total German forest area, produce almost 

 half the yield per acre of the State forests. The yield per acre 

 in timberwood of the different classes of forest property was in 

 1900 as follows : 



Crown forests 33.7% 47 cubic feet 



State forests 49 " 



Private forest, entailed (10.4%) 43 " " 



Other private forest (36.1%) 28 " 



Of the private forest (and communal) in Prussia 87%, in 

 Bavaria 91%, in Saxony 93% is in woodlots of less than 25 acres, 

 a size which does not lend itself readily to management. Hence 

 the endeavor has been to associate the small holders, but this 

 movement has found indifferent success. 



The second section brings judgments of authorities on the selec- 

 tion forest in general, which is mainly unfavorable. 



Even Gayer comes to the conclusion "that it does not satisfy 

 modern requirements." Judeich calls the enthusiasm created by 

 Gayer in natural regeneration a fashion and a fancy to be in- 

 veighed against. "In general the sober practice will not be misled 

 by the romance of the selection forest." 



Wagner in his late work, although admitting the naturalness of 

 this forest, calls it, considered from the economic point of view, 

 "a phantom, a purely silvicultural ideal, which few may not and 

 do not want to realize." Mayr says : "It has in full measure the 

 advantages of the virgin forest but renounces entirely the advan- 

 tages in volume and quality of the stand and area management." 



Altogether while recognizing its silvicultural advantages, it is 

 not considered commendable as an economic proposition. 



As regards the yield, the author cites some dozen definite cases 

 from Fankhauser's articles (briefed in F. 0. Vol. VI, p. 423) 

 which showed yields of from 118 to 246 cubic feet. 



The next section describes a dozen different methods of budget 

 regulation in selection forest which is recognized as one of the 

 mo.'^t difficult problems. There are Heyer's, Karl's and Hundes- 

 hagen's normal stock formulae and a number of others, all of 

 which are built upon theories applicable to a compartment system. 

 The author singles out four as preferable, namely those of 

 Gretsch, Tichy and Stotzer, who ascertain actual growth condi- 



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