252 EXPERIMENT STATION RECORD. 



of which 1,184 were .sulijected to complete analyses, 243 to determinations of purity, 

 and 310 to determinations of germination. Of the samples 934 were sent by seeds- 

 men, 69 by seed growers, and 508 by farmers, the rest being secured for original 

 investigations. An investigation as to the influence of concentrated sulphuric acid 

 on hard seeds of legumes showed that the germination of flat pea was greatly 

 improved by steeping the seeds in acid for one minute; after 60 days the germina- 

 tion of the treated seed was 84 per cent, and that of the untreated seed 28 per cent. 

 After 300 days all the treated seed had germinated, while those not treated showed 

 a germination of 76 per cent. It is likely that a longer treatment with sulphuric 

 acid will further improve the germination of flat pea. A sample of red-clover seed 

 left in concentrated sulphuric acid for 24 hours still contained 9 per cent of viable 

 seed.^ — F. w. woij,. 



Report of the Danish seed control station, 1897-98, ( ». Kostri-p {Tlilsslcr. 

 Landbr. Planteavl, G {1900), -pp. 1-37). 



Report of the Danish seed control station for the year 1898-99, O. 

 RosTKUP (Tidsskr. Landbr. Planteaii, 6 {1900), pp. 113-169). — Contains the usual 

 compilation of the results of seed analyses made during the year, and during the 

 decennium 1889-1899. Of other subjects treated in the report may be mentioned: 

 List of seeds of wild or cultivated plants found in seed samples of cultivated plants 

 sent to the Danish seed control station (pp. 135-154); on the decrease in viability 

 of seeds from spring to fall (pp. 156-158); germination trials of seeds of wild plants 

 (pp. 158-169); germination trials with cacti (p. 169). — f. w. woll. 



Twenty-seventh report of Markfrokontoret (seed office) {Copenhagen, 1S99, 

 pp. 32) . — The report contains the usual account of the work of the office, and a 

 number of papers on the culture of different agricultural I'rops. 



Reports of Swedish seed control stations for 1898 {Meddel. K. Landlbr. 

 Sli/r., 1900, No. 63, pp. 401-465). — Eighteen stations, in part supported by Govern- 

 ment, were maintained during the year; 8,258 seed samples were examined at these 

 stations during 1898, 6,147 complete analyses having been made, and 2,111 partial 

 analyses. Farmers sent in 3,161 samples, seedsmen 4,455 samples, and 638 samples 

 were secured by the stations themselves in special investigations; 19.6, 12.2, and 

 11.6 per cent of the samples received for examination were analyzed at the seed 

 control stations at Lund, Stockholm, and Oerebro, respectively. The average 

 results of the analyses for each kind of seed and for each station, with ranges of 

 results, are given in the report. — f. w. woll. 



Report of the seed control station at Lund, Sweden, for 1899, B. Jonsson 

 {Mai mi), 1900, pp. 20). 



Report of the seed control station at Gothenburg-, Sweden, for 1898-99 

 .]. E. Alex {Gbtebur/j, 1900, pp. 14). 



Report of the Skara seed control station for 1898-99, S. Hammar {Ber.. 

 VerL'i. Skara Kern. Sta. och FrokontroUanst., 1899, pp. 25-31). — A report is given of 

 the analyses of 149 lots of seed which were tested between July 1, 1898, and June 

 30, 1899. Of these rye, red clover, alsike clover, and timothy seed constituted 75 

 per cent of the samples. 



Some common Ontario weeds, F. C. Harrison {Ontario Dept. Agr., Toronto, 

 1900, 2>p. SO, Jigs. 34) . — A popular discussion is given on the introduction and spread 

 of weeds; methods of identification, classification, and eradic-ation. The more com- 

 mon weeds of Ontario to the number of 34 species are figured, popularly described, 

 and suggestions given for their eradication. Based upon rei)lies from corresjiondents, 

 the author represents graphically the comparative destru(;tiveness of Ontario weeds. 

 Those most troublesome in order of destructiveness are Canada thistle, mustard or 

 charlock, wild oati couch grass, ragweed, oxeye daisy, false flax, dock, burdock, and 

 foxtail. 



