Albert Einstein: Travel Diary to the U.S.A., 30 November 1930 - 15 June 1931.
One of the six travel diaries Einstein kept during his trips abroad.

Archival Call No. 29-134.

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The page depicted here describes the hectic departure of Einstein and his wife Elsa from the railway station in Berlin, 30 November 1930. First he loses his wife, finds her again, and then he loses the tickets and finds them as well. Thus began Einstein's second trip to the U.S. It would be the first of three trips to the U.S. in the early 1930s. During three consecutive winter semesters (1930-1932), Einstein visited the California Institute of Technology (Caltech) at Pasadena, California. Physicists at Caltech and astronomers at the nearby Mt. Wilson Observatory were working on questions relating to the expansion of the universe - an issue Einstein was very much interested in at the time.