Scope and Contents: Lecture notes. Some papers relating to Niels Bohr Institute matters in 1934. One folder of letters - varying from trivia to scientific, no long exchanges of correspondence; correspondents include: Niels Bjerrum, C.P.O. Christiansen, Bengt Edlén, Otto Robert Frisch (1939, about a piano), Rudolf Frerichs, A. Gatterey, Werner Heisenberg, Erik Hulthén, Pierre Jacquinot, Christian Klixbull-Jørgensen, Martin Knudsen, Hans Kopfermann, Lesche, Kurt Lidèn, William F. Meggers, K.A. Nissen, Friedrich Paschen (8 letters in the period 1932-1935), Kolding Folkeblad, Henry Norris Russell (3 letters, 1934), Manne Siegbahn, Charlotte Sitterly, Danish state railways, Danish National Library, Paula Strelitz, Bengt Strömgren, N. Thorkil-Jensen, S. Tolansky