628 Forestry Quarterly. 



Bohemia with the use of insect Hme. The results of this series 

 of experiments show that the use of insect lime is only a partial 

 protection and not reliable. The shorter the duration of the 

 invasion, the sooner the disease appears and other enemies deci- 

 mate the caterpillars, the more effective the lime rings. 



In the same Mitteilungen, Dr. Zederbauer discusses the influ- 

 ence of climatic conditions on the propagation of this insect and 

 a few others. 



It appears that there is a relation between rainfall and cater- 

 pillar multiplication. In rain-poor regions and rain-poor, dry 

 and warm periods the mass multiplication of these insects is fa- 

 vored. Such enormous multiplication is limited toward the north 

 and vertically by the July isotherm -|- 16° and the rainfall of 60 

 to 100 an. The most endangered regions are those having less 

 than 60 cm. rainfall. Regions with rainfall above 100 cm. do 

 not know the pests, while those having rainfall of 70 to 100 cm. 

 show large development only in dry years. 



Ucber die Polyeder Krankheit dcr Nonne. Centralblatt f. d. g. Forst- 

 wesen. June, 191 1. Pp. 247-268, and earlier numbers (1909.) 



Neue Anregungen aiis der forstlichen Praxis zur Bck'dmpfung der 

 Nonne. Forstwissenchaftliches Centralblatt. July, 191 1. Pp. i77-2)92)- 



Versuche zur Bek'dmpfung der Nonne mittelst Leimringen; and Kliina 

 und M assenvermehrting der Nonne vnd einiger andrer Forstsch'ddlinge. 

 Mitteilungen aus dem forstlichen Versuchswesen Oesterreiches. Heft 

 XXVI, 1911. 



MENSURATION, FINANCE AND MANAGEMENT. 



Schiffel discusses at great length and with 

 Effect much mathematical detail the influence of 



of faulty measuring of the factors on the re- 



Brrors suiting volume of round wood. 



in Price, i. e. value, depends in the first 



Measuring. place on volume, and with the increase of 



price per unit the question of correct meas- 

 urements is becoming more and more important. While at pres- 

 ent the middle diameter and length of a log is supposed to suf- 

 fice for a determination of volume, the author expects eventually 

 the use of several diameters and formulas, as developed by him. 

 (See F. Q., vol. II.) 



