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Memorial — Cyril K. Johns

Cyril K. Johns died December 13, 1982 at his home near Ottawa after a long illness. Born in England in 1899, he emigrated to Alberta in 1910. After service overseas in the army, he attended Olds School of Agriculture and then graduated from the University of Alberta in 1925 and McGill (M.Sc.) in 1926. After a brief stay with the Alberta Dairy Branch, he joined the Bacteriology Division of the Canada Department of Agriculture and commenced his life-time work in dairy bacteriology. On leave of absence, he earned his Ph.D. degree from the University of Wisconsin in 1937.

Johns was a pioneer in milk sanitation. He is probably best known for the development of the triple-reading resazurin test, and later, of preliminary incubation tests for assessing the sanitary quality of milk production. His work included studies on cleaning milking machines, comparative studies of chemical sanitizers and methods for their evaluation, and the role of bacteria in cheese ripening.