Periodical Literature. iii 



hence a very considerable reduction in figures is secured on such 

 calipers, namely to at most three. 



Several pages of records of actual measurements calculated to 

 volumes by five different methods and curves prove the propriety 

 of the contention as to the needful accuracy, as long as not single 

 cases but a series is measured. Schedules for keeping records 

 are given. 



Die Kreisfldchenkluppe. Centralblatt fiir das gesammte Forstwesen. 

 December, 1912. Pp. 541-554. 



During the last few years, Bavaria, Wiirt- 

 New temberg and Hesse have started in to 



Working Plans thoroughly revise and modernize their 



for working plans for State Forests. In 1912, 



Baden. Baden has followed suit with instructions 



AoT new working plans, after having passed 



through just a century since the first beginning of collecting data 



for working plans, several methods of budget regulation having 



been tried since that time. 



In 1836, a volume allotment, in 1846 a combined area and 

 volume allotment was prescribed, first worked out for a whole 

 rotation, then determining volumes only for the first decade. 



The area allotment found difficulties on account of the favored 

 selection forest system, so that by 1869 another change was made 

 to a normal forest method, but not the excellent one of Heyer, 

 namely without his allotment plan, calculating the actual stock 

 not with felling age increment, but relying on the current incre- 

 ment, and faulty in various ways. 



The new prescription makes the stand (Unterabteilung) the 

 unit of management ; as far as according to species, age, and site 

 it will probably remain permanently an area for independent 

 treatment. 



The minimum size of such a stand is not prescribed. Site 

 classes are made by use of average height and age according to 

 Eberhard's site class tables. For determining stock the same 

 tables are used, but, although the tables are correct, they are re- 

 duced by 10% to allow for the difference of the theoretical and 

 the practically available and saleable part of the volume. Only 

 the volume of the main stand is used, the intermediary stand, 

 5-10% of the total, is neglected, which opens up the possibility of 



