Work with the Auer Society on rare earths, luminescence, and radiation; an "invitation" to go to Russia in 1945 and work on uranium metal production. Otto Hahn's discovery of nuclear fission; the reactions of German physicists to this discovery. Great care taken while working with radiation. National Socialism and science in Germany; competition within the German uranium project, Werner Heisenberg; the interests of the Auer Society during the war; Riehl as one of the instigators of nuclear power in Germany; on the technique of smoking cigars. Riehl at the Munich Technical University as of 1955 and work with Heinz Maier-Leibnitz on a "swimming-pool" reactor. Also prominently mentioned are: Barwich, Adolf Hitler, Philipp Hr̲nes, Lise Meitner, Timofejew-Ressowsky, and Zimmer.