Frederick Banting and Charles Best on the roof of the University of Toronto’s Medical Building in 1922. Dogs were used as experimental subjects in the insuli. From the F. G. Banting Papers. Courtesy Thomas Fisher Rare Book Library, University of Toronto.

Frederick Banting and Charles Best on the roof of the University of Toronto’s Medical Building in 1922. Dogs were used as experimental subjects in the insulin tests.

Courtesy the C. H. Best Papers, Thomas Fisher Rare Book Library, University of Toronto.