1911 De Morgan Medal

2013 2010 2007 2004 2001 1998 1995 1992 1989 1986 1983 1980 1977 1974 1971 1968 1965 1962 1959 1956 1953 1950 1947 1944 1941 1938 1935 1932 1929 1926 1923 1920 1917 1914 1911 1908 1905 1902 1899 1896 1893 1890 1887 1884