046 JOURNAL OF FORESTRY 



an intensive map classification, but it certainly behooves the Forest 

 Service to revise and intensify its map system for the Eastern National 

 Forests so as to provide for more intensive working plan maps. 



T. S. W., Jr. 



Indian Forester, Vol. 45, pp. 454-469. 1919. 



The assertion frequently made that German 



Wartime Cutting forests were greatly overcut during the war is 



in German Forests not generally true. The writer cites the records 



for a forest under his charge, comprising 12,000 



hectares, about half softwood and half hardwoods, with a stock of 



more than 3,300,000 cubic meters of wood and an annual cut of about 



90,000 cubic meters. The actual cut during each of the four years 



1915 to 1918 was less than that provided by the working plan. A table 



shows the annual cut for every year since 1899, and for single years 



as far back as 1577. W. N. S. 



Eulefeld. Zahlcn-Nachzveisung aus dcm Privatimld. Forstwiss. Centralbl., 

 41:53-57. 1919. 



UTILIZATION, MARKET, AND TECHNOLOGY. 



During the war Germany was forced to secure 



Resin Production its naval stores from home sources, spruce and 



of pine, thus reviving the naval store industry. 



Scotch Pine After four years of unsystematic practice, a 



systematic investigation of the business and 



especially of the physiological factors influencing the resin flow of the 



pine was undertaken in the Bavarian Forest Experiment Station by 



Lutz Schierlinger. He reports at great length his results. We give 



the author's summary of those for practical application : 



1. The resin yield depends in greater measure on physiological 

 factors than on the technique of utilization. 



2. Slender trees with good crowns, grown in the open, are specially 

 fit for turpentining. Forking increases the yield capacity, abundance 

 of cones seems to diminish it. 



3. The resin ducts of the entire sapwood form a communicating 

 system. The resin flow is most perfect in vertical direction ; but also 

 the tangential and radial flow are of great significance. 



4. When the resin present below the scar, or that newly formed frotn 

 the reserve materials there imbedded, is pressed out, it is replaced 

 through resin flow exclusively from above. 



