. . . . . . . . . . . . . . . "Includes correspondence, primarily with scientists, files with scientific notes, manuscripts, and newspaper articles. A major part of the correspondence is with foreign scientists, such as: Wilhelm Bjerknes, Niels Bohr, Ludwig Boltzmann, Georg Bredig, and Ernst Cohen. Prominent Swedish scientists represented include: Carl Benedicks, Wilhelm Ostwald, Ernst Riesenfeld, Hans von Euler Chelpin." . . . . . . . . .