[dymond] elevator SCREENINGS 93 



by a great reduction in the expense of handling and transportation, but 

 also through its value as a feed for livestock. 



The idea of operating an efficient cleaner as an attachment to a 

 grain thresher is not new. Cleaners are employed on threshers in the 

 Argentine Republic and Chili, which receive machines from the same 

 American and Canadian firms as supply the prairie provinces. But 

 the manufacturers of these machines seem to have the impression that 

 the Canadian grain grower believes there is no advantage in having his 

 grain cleaned in threshing, and consequently does not want even the 

 ordinary cleaning screens supplied with the machines to be used for this 

 purpose. In the opinion of the manufacturers, threshing machines as 

 at present constructed might be operated to remove much of the screen- 

 ings now left in the grain. 



Literature Cited 

 Brenchley, W. E., "The uses of Weeds and Wild Plants" in Science Progress, Vol. 



XIV, pp. 121-133, 1919. 

 Bulletin of the Imperial Institute XIII (1915) pp. 452-460. "Production and 



Utilization of Rape Seed." 

 Carver, T. N., "The Principles of Rural Economics." Boston, 1911. 

 Clark, G. H., & Fletcher, Jas. "Farm Weeds of Canada." Second Edition, 



Ottawa, 1909. 

 Dymond, J. R. "The Screenings Problem" in The Agricultural Gazette of Canada, 

 Vol. I, pp. 694-696, 1914. 



Archibald, E. S. & Elford, F. C. "Grain Screenings." 



Dept. of Agriculture, Ottawa, 1915. 

 Magill, R. "Grain Inspection in Canada," Dept. of Trade and Commerce, 



Ottawa, 1914. 

 Nelson, E. K. "A Chemical Investigation of the Oil of Chenopodium," U. S., 



Dept. Agr., Bureau of Chemistry, Circ. No. 73-1911. 

 Oswald, E. I., "The Effect of Animal Digestion and Fermentation of Manures on 



the Vitality of Seeds." Maryland Agric. Exp. Station, Bull. 128-1908. 

 Pammel, L. H., "The Problems of Weeds in the West" in Proc. Iowa Academy of 

 Science. Vol. XV, p. 34-46, 1910. 



"A Manual of Poisonous Plants." Cedar Rapids, Iowa, 1911. 



Patterson, H. J., & White, H. J. "By-Product Feeds." Maryland Agric. Exp. 



Station, Bull. 168, 1912. 

 Shutt, F. T., "Farm Feeds," Dept. of Agric. Experimental Farms Branch, Bull. 



No. 36, Ottawa, 1919. 

 Sifton, H. B., "Injurious Weed Seeds in Feeding Stuffs" in Agric. Gaz. of Canada, 

 Vol. V, pp. 951-957, Ottawa, 1918. 

 For statistics 



Prior to 1916, Grain Statistics and the Report of the Board of Grain Com- 

 missioners comprised Part V of the reports of the Department of Trade and Com- 

 merce. 



Since 1916 the Report of the Board of Grain Commissioners for Canada has been 

 published as a separate report. 



Report of the Grain Markets Commissioner of the Province of Saskatchewan, 

 Regina, 1914. 



