456 EXPERIMENT STATION RECOED. 



The composition of cork oak and its bearing on forestry, E. Gixstixiaxi (Jour. 

 Jgr. Prat., 1900, 1, Xo. Jl, pp. 7/^.3-745). — Analyses are given of the bark and wood, 

 and of the ash of bark, wood, roots, leaves, and acorns of the cork oak, and the bear- 

 iiijr these analyses have upon forests and forest planting. 



The Robinia and its exploitation, P. ^Iouillefert [Jour. .{(jr. Prat., 1900, I, 

 Nos. 16, pp. 578-581 ; 17, pp. 603-1)05, Jhj. l) . — Notes are given on the value of Robiida 

 p.seudaeacia for forest planting. 



On the ■working qualities of some colonial timbers, H. Stoxe (Agr. Jour. 

 Cape Good Hope, 17 {1900), No. 4, pp- 317-~'25). — A report is given of the results of 

 a series of technical tests of a number of species of indigenous and introduced timbers. 



G-ro-wing Norway spruce for paper pulp, T. L. Duncan {Amer. Gard., 21 {1900) , 

 No. 296, pp. 567, 568). — The author recommends the growing of Norway spruce 

 {Picea e.rcelsa) for paper pulp manufacturing. Data are given on the rate of growth 

 of a number of lots of this spruce in Minnesota, aufl under proper conditions of cul- 

 ture and fire protection it is believed that it would furnish a crop suitaljle for wood 

 pulp in from 25 to 30 years, a period much less than the time required for the growth 

 of the ordinary white and red siiruce. 



A suggestion for the estimation of cord ■wood, G. F. Schwarz (i^o^'esto-, 6 {1900), 

 No. 4, pp. 76-78). — The author explains a system of estimating cord wood in standing 

 forests, which method is known in Europe as the ' ' absolute factor of shape. ' ' It is 

 considered a very accurate one and has been employed extensively in Denmark with 

 entire satisfaction. In a beech and oak forest in Germany this method was tested 

 and proved more accurate than measurements made by other systems. The method 

 is believed to possess certain advantages over the others and to be adaptable to the 

 varying conditions of American forests. 



Practical estimation of timber, P. ]\Iouillefert {Jour. Agr. Prat., 1900, I, No. 

 12, pp. 427-4S0 ). — Fornuilas are given for the estimation of w^ood and timber in forests. 



Railroad forestry, J. H. Sutoe {Sci. Amer. Sup., 50 {1900), No. 1286, jjp. 20619, 

 20620). 



Means for preventing ■worm holes in timber, E. Mer {.Tour. Soc. Agr. Brabant- 

 Haniaut, 1899, />]>. 4-j4, 4-35). 



Fireproofing ■wood {Sd. Amer., 83 {1900) , No. 4, pp. 49-55, Jigs. 4)- — A description 

 is given of a method of fireproofing wood for building purposes. 



SEEDS WEEDS. 



Twenty-first annual report of the Swiss seed control station 

 at Zurich, F. G. Stebler, E. Thiele, and A. Volkakt (Landtr. 

 Jahrl. Scliimdz^ IJ^. (1900), JVo. J,j)p. 48,Jigs. 2). — A report is o-iven of 

 the activities of the station during- the j^ear ended June, 1899. During 

 this period 8,478 samples of seed were tested, the investio-ations requir- 

 ing 21,274 tests. These trials served as the basis of a guarantee for 

 about 350,000 kg. of clover and grass seed. Most of the samples of 

 seed tested for consumei's were found in excess of the guarantee, few, 

 if an}', falling below the difference allowed by the regulations of the 

 station. 



A tabular statement is given showing the result of the year's tests 

 of different seeds, and also the average percentage of purity, germina- 

 tion, and intrinsic worth of all seed examined since the establishment 

 of the station. Detailed statements are also given of the tests of clover 

 and urass seeds and o-rass seed mixtures. 



