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REPOUT OF THE COUNCIL 



OF THE ASSOCIATION OF ECONOMIC BIOLOGISTS FOR THE 



YEAR, 1921-2. PRESENTED TO THE ANNUAL GENERAL 



MEETING, FEBRUARY 24th, 1922. 



During the year eight meetings have been held which have usually- 

 been devoted to discussions. The meetings have been well attended, 

 an average of 77 members and friends being present. The following 

 sixteen communications have been made to the Association: 



Dr A. S. Home (Imperial College of Science). "(I) Cultures of 

 Polyopeus. (II) Demonstrations of the Enzymic action of Polyopeus 

 in Solid Nutrient Media containing Starch." 



Dr S. G. Paine (Imperial College of Science). "(I) Cultures of the 

 Causal Organism of a Potato Disease. (II) A Novel Method of Inocula- 

 tion of Potato Tubers." 



Dr Wm B. Brierley (Rothamsted Experimental Station). "(I) The 

 Differential Infection of Pure Lines of Wheat by Biological Forms of 

 Puccinia graminis tritici (from the Department of Plant Pathology, 

 University of Minnesota)." 



Mr G. C. Gough (Ministry of Agriculture). "(I) Potato Tubers In- 

 fected Simultaneously by Corky Scab and Wart Disease." 



Dr J. Davidson (Rothamsted Experimental Station). "The Cells of 

 Plant Tissues in Relation to Cell Sap as the Food of Aphids." 



Mr E. R. Speyer (Lea Valley Research Station). "Ceylon Ambrosia 

 Beetles and their Relation to Problems of Plant Physiology." 



Mr Millard (Leeds University). "Green Plant Matter as a Decoy for 

 Actinomyces Scabies in the Soil." 



Mr E. H. Richards (Rothamsted Experimental Station). " The Action 

 of Bacteria and Protozoa in Conserving the Nitrogen in Sewage." 



Mr Wiltshire (Long Ashton Research Station). "The Methods of 

 Infection of the Apple Canker Fungus." 



Mr Engledow (Cambridge Plant Breeding Institute). "The Problem 

 of Increasing the Yields of Cereal Crops by Plant Breeding." 



Mr Saunders (National Institute of Agricultural Botany). "Some 

 Problems of Seed Testing." 



