850 EXPERIMENT STATION RECORD. 



Some methods of seed investigation, L. von Traisz {Bot. CenthL, 82 {1900), 

 No. 9, pp. 269, '270'). — Different methods for treating refractory seed before placing 

 them in the germinating chamber are discussed. For such seeds the author recom- 

 mends soaking in water, after which they are heated in weak caustic potash and 

 then neutralized with acetic acid. 



Regulations and standards of the Vienna seed-control station, T. Ritter 

 VON AVeixziekl {Pi'h. K. K. ,Sinuen-( brttrol-Siu. Wien, Xo. 208, jip. 23). 



Rules for agricultural -wholesale dealers of seeds and feeding stuffs, T. Rit- 

 ter vox Weinziekl {Pah. K. K. Suinen-Control-Sta. Wien, No. 205, pp. 23). 



Composition of grass-seed mixtures, T. Ritter von Weinzierl {Pub. K. K. 

 Samen-Control-Sta. Wien, No. 207, jyp. 48). — A third edition of the author's bulletin on 

 grass-seed mixtures. Suggestions are given for making grass mixtures for different 

 purposes and the amount of seed required per hectare. 



Some difficult germinations, N. Bernard {Rev. Gen. Pot., 12 {1900), No. 135, pp. 

 108-120). — Results are given of a study of the germination of a number of seeds and 

 spores of plants whose subterranean parts are normally inhabited by endophytic 

 fungi. The plants studied were several species of orchids, lycopodiums, and ferns. 



Resistance of seeds to mercury, C. De Candolle {Arch. Sci. Phys. et Nat., 8 

 {1899), j)p. 517, 518; abs. in Jour. Roy. Micros. Soc. \_London'], 1900, No. 2, p. 222). — 

 Grains of wheat, after being submerged for 4 years in mercury, were germinated and 

 produced normal plants. 



Nineteenth annual report of the Vienna seed-control station, T. Ritter 

 VON Weinziekl {.Tahro^ln'r. K. K. Sumen-ControlSta. Wien, 1900, pyp- 32). — Gives a 

 report of the activity of the station for the j'ear ended July 31, 1899. During this 

 period 25,763 analyses were made, as well as field and laboratory investigations upon 

 a number of topics, as grass mixtures; experiments with Nitragin and Alinit; and 

 studies of clover, beet, flax, tree, and cereal seeds. The usual data as to purity, 

 germinative ability, etc., are given in tabular form. 



The vitality of weed seeds t'wrenty years in the soil, W. J. Beal {Proc. Soc. 

 Prom. Agr. Sci. 1899, j>p. 8G, 87). — This article has been previously noted (E. S. R., 

 11, p. 856). 



Ne-w weed arrivals, AV. Lochhead ( Ontario Agr. Col. and E.xpt. Farm Rpt. 1899, 

 pp. 37-39, fig.'i. 3). — Descriptive notes are given of 2 weeds which have made their 

 appearance in Ontario, and it is thought possible may become troublesome. They 

 are prickly lettuce {Lactura scariola) and the broad-leaved gum plant {Grindelia 

 squarro.sa). 



Experiments with weeds, B. D. Halsted {New Jersey Stas. Rpt. 1899, pp. 407, 

 408). — In continuation of exi^erinients outlined in a previous report (E. S. R., 11, 

 p. 749), the author has conducted his investigations on the ability of weeds to with- 

 stand or encroach upon each other. These experiments have been conducted for 3 

 seasons. The most aggressive weeds at the present time are Ambrosia artemisisefolia. 

 Polygonum per-s'icaria, Syalherisma \^Panicum'\ sanguiiuilh, Rumex acetosella, and Alsine 

 media. 



The extermination of w^eeds, E. W. Hiloard {California Sta. Circ, Sept., 1898, 

 pp. 3). — Brief rules are given regarding the principles of weed extermination. 



The passing of the Russian thistle, C. E. Bessev {Proc. Soc. Prom. Agr. Sci. 

 1899, pp. 83-85). — This jtapcr lias been previously noted (E. S. R., 11, p. 858). 



Destruction of Cardamine pratensis, L. Grandeau {Jour. Agr. Prat., 1900, I, 

 No. 21, pp. 742, 743). — Notes the destruction of this weed by spraying with copper 

 sulphate. The author advised the substitution of iron sulphate for copper sulphate 

 on account of the possible injury to stock eating herbage that contained considerable 

 of the copper. Analyses of samples of mixed herbage that had been sprayed with 

 copper sulphate showed about 3.94 gm. of copper sulphate to 10 kg. of forage. 



