Periodical Literature. 131 



the ring width at the turning point, and then it sinks from crown 

 base to top more rapidly, in the given case to one-fifth of ring 

 width at the turning point. 



The completely free grown tree behaves like the trees set free. 



These findings of the difference of form development according 

 to position of trees suggests that the usual form factors are of no 

 avail in the selection forest and that, to secure volume growth 

 data, dififerentiation must be made in calipering into stems quite 

 free, half free, closed and crowded tree classes, and to ascertain 

 special form factors from sample trees of these. By the use of 

 diagrams the six different forms that may be found are eluci- 

 dated and for the increment per cent, calculation the constants 



for the formula are found to vary from 350 to 940. 



nd 



Before these constants had been developed the increment had 

 been ascertained by Schneider's formula as 59 cubic feet per 

 acre on a volume of 2,000 cubic feet per acre or 3 per cent, nearly. 



A revision of this finding after 23 years seemed, however, to 

 make the increment only 26 cubic feet, the correctness of which 

 the author doubts and dismisses without explanation, expect- 

 ing to make new measurements with his new method. 



Several pages are filled with detail prescriptions as regards 

 felling practice and regeneration, which cannot be briefed. 



Der gemischte Buchenplenterivald auf Muschelkalk in Thuringen. AU- 

 gemeine Forst- u. Jagdzeitung, May, 1910. Pp. 149-164. 



MENSURATION, FINANCE AND MANAGEMENT. 



The financial difficulties of various German 

 Forest states have lately led to propositions to in- 



Management crease their cut or curtail the expenditures 

 of ■ of forest administration. An increase in 



Hesse. the number of districts and district mana- 



gers, which had been installed in 1900 in 

 Hesse has led to an inquiry of this sort and as a result a very 

 interesting comparison of the results of the decade 1889-99 with 

 those of the period 1900-09, attained in the management of the 

 crown forests of Hesse has been published, which shows remark- 

 able advances. 



The area involved is only 177,000 acres, of which only 31% 



