William Beaumont

William Beaumont (born Nov. 21, 1785, Lebanon, Conn., U.S.—died April 25, 1853, St. Louis, Mo.) was a U.S. army surgeon, the first person to observe and study human digestion as it occurs in the stomach. On June 6, 1822, while serving at Fort Mackinac (now in Michigan), Beaumont was summoned to Michilimackinac to treat Alexis St. Martin, a 19-year-old French-Canadian trapper, who had been wounded at close range by a shotgun blast. The shot had...