In 1931, while engaged in research at the California Institute of Technology, he visited the Zoellner family conservatory in Los Angeles, where he played some of Beethoven and Mozart's works with members of the Zoellner Quartet.
Pada tahun 1931, ketika terlibat dalam penelitian di California Institute of Technology, ia mengunjungi keluarga konservatorium Zoellner di Los Angeles, di mana ia memainkan beberapa karya Beethoven dan Mozart dengan anggota Zoellner Quartet.