University of Toronto Archives. A1982-0001, Box 2, Folder 5
Title based on content of letter.
Edward C. Kendall isolated thyroxin, the active principle of the thyroid gland in 1914 while at the Mayo Clinic. In 1950 he shared the Nobel Prize in Physiology and Medicine with Tadeus Reichstein and Philip Showalter Hench for 'for their discoveries relating to the hormones of the adrenal cortex, their structure and biological effects.'