Scope and Contents: One box with manuscripts 1920s-1960s. One box with correspondence (1916-1970). Correspondents include: Pierre Auger, E. Bauer, Guido Beck, Harald Bohr, Niels Bohr, Max Born, Ernst Cassirer, Stanley Deser, Paul Adrien Maurice Dirac, Paul Ehrenfest, Franzinetti, George Gamow, Walter Gordon, Dirk ter Haar, Douglas Rayner Hartree, Dmitri Iwanenko, Pascual Jordan, Jens Lindhard, Fritz London, Robert Eugene Marshak, Thomas Marshall, Lise Meitner, Yoshio Nishina, Carl Wilhelm Oseen, Wolfgang Pauli, Léon Rosenfeld, Svein Rosseland, Abdus Salam, Bartel Leendert van der Waerden, John Archibald Wheeler, Gian Carlo Wick, Hideki Yukawa.