"for the discovery of insulin."
J. J. R. MACLEOD WAS BORN IN CLUNY, PERTHSHIRE, SCOTLAND, on September 6, 1876. He was educated at the Aberdeen Grammar School and the University of Aberdeen, studying medicine at Marischal College. He was graduated in 1898, was awarded the Anderson Research Travelling Fellowship, and studied biochemistry in Leipzig under Siegfried and Burian. In 1900 he became attached to the London Hospital Medical College, as demonstrator in physiology under Leonard Hill. In 1903 he was appointed professor of physiology at the Western Reserve University, Cleveland, Ohio, where he remained for fifteen years; during most of this time he carried on investigations in carbohydrate metabolism. In 1918 he accepted the position of professor of physiology at the University of Toronto, where the work on insulin was performed. In 1928 he returned to Scotland as professor of physiology at the University of Aberdeen. Here he continued his research both within the University and at the Rowett Research Institute. He also served on the Medical Research Council. In his later years Professor Macleod fell victim to a crippling arthritis. His health gradually became worse and he died on March 16, 1935. His scientific, literary, and educational work was very extensive. He was the author of several books including a well-known text, Physiology and Biochemistry in Modern Medicine. He was very successful as a teacher, and some of the most distinguished medical scientists of the mid 20th century in the United States and Canada were trained in Macleod's laboratory.