SEEDS WEEDS. 379 



the shock froni 3 to 6 weeks during rainy, misty weather showed a diminished aver- 

 age germination dependent upon the time the grain was exposed to the weather. 

 The relation between the weight per bushel and the germinating power of a number 

 of samples is shown, from which it appears that in general the germinative ability 

 of seed increases with its weight per bushel. 



Twenty-sixth report of the Swiss seed control station at Zurich, F. G. 

 Stebler et al. {Landw. Jahrb. Schweiz, 18(1904), No. 2, pp. 45-100, fig*. 4). — A 

 report is given of the operations of the station in testing seeds for the year ended 

 June 30, 1903. During this period 10,274 investigations were made and the maxi- 

 mum, minimum, and average germination of the different kinds of seed are reported. 

 These investigations represented 339,203 kg. of seed. In addition to the germination 

 and purity tests, examinations were made for dodder seed. The relative value of 

 different kinds of clover seed, alfalfa, vetches, and various grasses was also studied. 

 The average purity and germination of all samples of seed tested between 1876 and 

 1903 are shown in tabular form. 



In addition to notes on seed testing, descriptions are given of investigations on cer- 

 tain plant diseases, including a leaf-spot disease of English rye grass caused by Ovu- 

 laria lulii and a leaf-spot disease of white clover due to Stagonospora trifolii. 



Second annual report of the Central Seed Testing Laboratory cf the 

 Aynsome Agricultural Station, Grange-over-Sands, J. S. Remington (.1////. 

 Rpt. Cent. Seed Testing Lab. , Aynsome Age. Sta.-, Grange-over-Sands, 2 (1903-4), pp. 50). — 

 An account is given of the seed-testing operations conducted during the season 1903—4. 

 There were examined during this time 1,077 samples of seeds of all kinds, an increase 

 of about 75 per cent over the amount tested the previous year. A detailed report is 

 given of the results of the different tests, in which the purity, germination, pres- 

 ence of dodder, etc., are shown. In addition to the tabular statements given, the 

 forms of blanks used at the station are shown. 



Modern seed testing (Reprint from Mag. Com., 1903, Oct., pp. 7, jig*. 8). — The 

 importance of good seed and the necessity for scientific and systematic seed testing 

 are shown, and a description given of the Aynsome Seed Testing Station. 



Seed testing, J. S. Remington (Reprint from Rog. Lancashire Agr. Soc. Jour., 1903, 

 pp. 8). — A description is given of methods of seed testing pursued in the Aynsome 

 Seed Testing Laboratory, and tables given showing the maximum and minimum of 

 purity and germination of different varieties of seed as determined by investigations 

 which have been carried on at the station. 



Technical rules for seed testing, J. S. Remington (Grange-over-Sands, Eng.: 

 Aynsome Agr. Sta., 1903, pp. 8). — The technical rules for seed testing as practiced at 

 the Central Seed Testing Laboratory of the Aynsome Agricultural Station are given. 



Seed testing and seed-testing apparatus, H. Wichmann (Mitt. Osterr. Vers. Stat, 

 n. Akad. Brauind. Wien, 1904, PP- 7-11; separate from Allg. Ztschr. Bierbrau. u. Malz- 

 fabrik., 1904, Mai). — A report is given of experiments on the germination of barley, 

 in which comparative tests of different forms of germinating apparatus were made. 



A report on present methods and standards of seed testing, A. Voigt 

 (Separate from Jahresber. Ver. Vert refer Angeiv. Bot., 1 (1901), pp. 1-11) . — The author 

 discusses methods of seed testing and standards which are followed in some of the 

 countries of Europe. 



Selection of seed by chemical methods, Wood and Berry (Pror. Cambridge 

 Phil. Soc, 12 (1903), No. 2; abs. in Bot. Centbl, 95 (1904), No. 19, p. 513).— Studies are 

 in progress to determine the possible relationship between the chemical composition 

 of beets, ruta-bagas, and mangel-wurzels, and the ability to transmit these character- 

 istics through their seeds. 



