Periodical Literature. 87 



MENSURATION, FINANCE, MANAGEMENT. 



One of the most successful and most profit- 



Working able of forest administrations is to be found 



Plans in Baden, the results of which were briefed 



in at greater length in volume VI, p. 199 ff. 



Baden The method of regulating the felling budget 



was described at greater length at a recent 

 meeting of the Badish Forestry Association, and as it appears to 

 us the most rational of all the methods employed, we reproduce 

 the account at length. It is based upon the normal forest idea 

 and uses Heyer's well known formula to check the budget. This 

 method has been applied on nearly one million acres of State and 

 communal forest. Although older working plans exist, the more 

 general making of working plans was begun in 1836, and it re- 

 quired twenty years before the communal forests, which are ad- 

 ministered by the State, were all brought under working plans, 

 while in the State forests 60 to 70 years passed before the final 

 regulation. At first, an area and volume allotment method was 

 applied, but in 1846, when the first revision of the original plans 

 was had, the securing of a normal stock was made one of the 

 problems requiring solution from the new working plans. 



In 1849 it was realized that a circumstantial working plan for 

 the whole rotation was useless because surrounded with too many 

 uncertainties (interferences by windfall, snow pressure, fire, in- 

 sects) ; the working plan was made by area allotment in detail 

 for the next decade, otherwise showing merely a summary area 

 control for the rest of the rotation, from which the areas allotted 

 to the different periods could be seen. The budget was then de- 

 termined from experience of felling results or by sample fellings. 

 Finally in 1869, after 35 years of experience, the Heyer method 

 was adopted. This requires the calculation of the actual (as) 

 and the normal stock (ns) and the increment (i) during the 

 period of regulation or equalization (e), in which the normal 

 stock is to be established, when the admissable felling budget (&) 



as + (i X e) — ns, 



is determined as b = i e.. the actual incre- 



e 



ment during e is cut, increased or diminished by the amount of 



difference between the actual and normal stock. 



To obtain the data required by this formula, as far as they 



