Graduate studies in Berlin in the early 1930s with Beutler; Ph.D. in molecular spectroscopy, 1934. Contacts in Denmark lead to stay at Niels Bohr Institutet as James Franck's assistant working on photo-synthesis, 1934-1935. Levi changes fields after Franck leaves and Otto Frisch and Georg von Hevesy arrive: she builds Geiger counters with Frisch, then works with Hevesy on induced radiation experiments. Lengthy discussion of how Hevesy's active work style and inspiring attitude engaged people at many different institutions, including herself. Collaborations among Bohr's Institute and other groups, e.g. Enrico Fermi's Institute in Rome, August Krogh Institute, and the Finsen Institute. Anecdotes about Bohr and Hevesy; an account of the beryllium sources handmade by Frisch and Levi. Levi's work in Sweden at the Wenner-Gren Center Foundation during World War II. Discussion of Bohr, Krogh, and Paul Bergst as leaders.