elected President of the IUCr, with Ralph Walter Graystone Wyckoff and ArneWestgren as Vice-Presidents. Ewald was elected as 5th President of the IUCr,
1901–1923 Henrik Gustaf Söderbaum, 1923–1933 Henning Pleijel, 1933–1943 ArneWestgren, 1943–1959 Erik Rudberg, 1959–1972 Carl Gustaf Bernhard, 1973–1980 Tord
nominations. The committee received reports from Theodor Svedberg and ArneWestgren [de; sv]. These chemists were impressed by Hahn's work, but felt that