PERIODICAL LITKRATURE 4(50 



MENSURATION, FINANCE, AND MANAGEMENT 



In discussing the propriety of giving technical 



Results foresters of Switzerland a freer hand in the nian- 



of agement of their charges, BioUey cites a definite 



Forest example of the result of technical management. 



Management It refers to the communal forest of Hoveresse, of 



less than 300 acres in extent, about 3,000 to 3,500 



feet elevation, southeast exposure, steep, stony and rocky, abused and 



mismanaged, until the law of 1869 brought improvement, so that by 



189 1 a cut of 40 cubic feet per acre was possible. After that date a 



new working plan, after the methode du controle, in selection forest 



came into operation and the conditions in 1892 and again in 1916, 25 



years of management, show as follows : 



1892. 1916. p^;^j^„t. 



Growing stock, total, cubic feet 38,275 43,815 .... 



Growing stock, per acre, cubic feet 335 383 14.0 



Of this: 



Small sizes, per cent 39.4 27.2 — 12.2 



Medium sizes, per cent 46.7 48.2 1.5 



Stout sizes, per cent 13.9 24.6 10.7 



Volume of average tree, cul)ic feet 28 35 25.0 



Increment, per acre, cubic feet 138 146 6.0 



Cut, per acre, cubic feet 65 104 60.0 



The last figure, which is still increased by thinning material to 115 

 cubic feet, presumably based on a sustained-yield calculation, is the 

 most striking. 



Schweiccrischc Zcitschrift fiir Forstwescn, November, 1917, p. 300. 



UTILIZATION, MARKET, AND TECHNOLOGY 



In a paper read before the Society of Chemical 



Cellulose Industry on January 25, 1918, Dr. R. Johnsen 



Content and R. \V. Hovey, of the Forest Products Labo- 



of ratories of Canada, discuss at great length inves- 



JVood ligations into the cellulose contents of wood. 



Wood chemistry as a whole is in a chaotic con- 

 dition, because no standard method of investigation is developed. The 

 authors describe their own method. From the tabulated results, it ap- 

 pears that there are striking diflfcrcnces in composition of coniferous 

 and broadleaf woods, the latter giving a considerably larger yield of 

 furfural, while the former yield more methyl-furfural. 



It seems impossible with any of the present methods of analysis to 



