204 Forestry Quarterly. 



A warfare against weeds is aided by a leaf- 

 Bxtirpating let of the Biological Section of the Imperial 



Weeds. Health Department at Berlin, in which, be- 



sides the usual mechanical removal, pre- 

 vention of seeding by cutting weeds at the proper stage, clean 

 culture, etc., there is recommended the use of a copperas solution, 

 which has proved effective. The copperas must be fresh, made 

 into a 15 per cent, solution in a wooden cask, preferably using 

 warm water to expedite the solving. For 1 acre about 15 to 20 

 quarts are required, or 60 to 75 lbs. copperas. Spraying pumps 

 may be used, the spraying must be done neither too early when it 

 would require repetition, nor too late when it would not kill the 

 weeds. Unfortunately not all cultivated plants can resist, like 

 the grain does, this treatment. Whether this means can be used 

 in nurseries is still in question. 



Forstwissenschaftliches Centralblatt. February, 1909. Pp. 1 18-120. 

 MENSURATION, FINANCE AND MANAGEMENT. 



Adolf Sterbik at Ferchenhaid, Bohemia, 

 Universal offers for 144 Kr. ($36) an improved 



Dendrometer. Winkler-Grossbauer dendrometer, for which 

 he claims that it will measure heights to 

 i — £% accuracy; diameters to 1/400; can be used to cube ac- 

 cording to various methods ; can be used to measure and locate 

 lines and angles ; measure and locate areas ; can be used with a 

 tripod as levelling instrument. A description with illustration is 

 given. 



Allgemeine Forst-u. Jagdzeitung. Dec. 1908, p. 450. 



The activity in forestry matters of Sweden 

 Growth should be of interest to our Northeastern 



Relations. States and Canada, since they are dealing 



with similar northern conditions. A care- 

 ful investigation of volume and form of pine and spruce by Maas 

 in Darlekarlien laid down in 14 tables brings rather interesting 

 and new general results of growth relations. 



The author points out that volume tables arranged only by 

 diameter and height, or even by age, diameter and height do not 



