He joined several expeditions to study solar eclipses in Benkoeben in 1925, Sumatra in 1932, Memphri in Canada in 1936 and Kamishri in Japan.
Hie war bei folgenden Expeditiounen dobäi: Benkoeben 1925, Sumatra 1932, Memphri, Canada, 1936 a Kamishri a Japan.