FIELD CROPS. 



321 



The Uredineae of Finland, J. I. Liro (formerly Lindroth) (Bidr. Kdnn. 

 Pinland!^ Natiir och Folk, 1908, No. 6\5, pp. 6.'t2, flffs. 15). — This Is a contribution 

 on tlie morphology, biology, wintering forms, injury, and method of investiga- 

 tion of rusts. After discussing these different factors, systematic descriptions 

 are given of the species occurring in Finland, 240 having been so recognized. 

 The synonymy of the different species is given in full, and an extensive bibli- 

 ography concludes the work. 



Culture experiments with some rust fungi, I, II, J. I. Liro (formerly 

 LiKDBOTH) {Acta Soc. Fauna et Flora Fciinica, 29 (1906-1908), Nos. 0, pp. 25; 

 7, pp. 58, figs. 6). — Descriptions are given of culture experiments with a num- 

 ber of rust fungi, the object of the investigations being to determine the 

 alternate generations, host plants, methods of wintering, specific relationships, 

 affinities, etc. 



The death rate of bacteria under the action of disinfectants, Harriette 

 Ohick (Rpt. Brit. Assoc. Adv. Sci., 1908, pp. 901, 902). — The author claims 

 that disinfection is a process closely analogous to chemical reaction, the dis- 

 infectant representing one reagent and the protoplasm of the bacterium the 

 other. The process is found to proceed in accordance with the mass law, the 

 number of surviving bacteria being substituted for the concentration of 

 reacting substance. The number of living bacteria, when enumerated after 

 successive intervals of time, is found to decrease in a logarithmic manner. 



The experiments upon which these conclusions are based Avere made by the 

 author and other workers with spore-bearing and vegetative types of a num- 

 ber of bacteria, employing metallic salts, phenol and other coal-tar derivatives, 

 and heat as means of disinfection. 



FIELD CROPS. 



Field experiments with farm crops, W. Saunders, J. H. Grisdale, W. T. 

 Macoun, F. T. Shutt, C. E. Saunders, R. Robertson, J. Murray, A. Mackay, 

 W. H. Fairfield, G. H. Hutton, and T. A. Shakpe (Canada Expt. Farms Rpts. 

 1908, pp. 5-9, 17-31, 33, 34, 38, 39, 80-90, 12J,-127, 131, 132, 135-152, 216-219, 

 223-2J,0, 267-283, 291-305, 317-336, 357-366, 368-380, pis. 4).— The results 

 with field crops at the Canada Experimental Farms in 1907 are reported, in 

 a manner similar to that in previous years (E. S. R., 19, p. 935). 



A general review of the season is given and a brief report on culture tests 

 with wheat, emmer, oats, barley, corn, turnips, and potatoes at Ft. Vermilion, 

 350 miles north of Edmonton, is presented. In brief descriptions of visits 

 to the different farms, the work of each place is briefly summarized. The 

 results of variety tests at the different farms are summarized in the following 

 table : 



Varieties leading in yield at (lie Canada Experimental Farms in 1907. 



