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Dr. Robert A. Millikan: Fundamental Measurements in Electricity and Radiation, 1937


In 1921, persuaded by George Hale and Arthur Noyes, Millikan moved from Chicago to the newly-established California Institute of Technology in Pasadena and the Directorship of its Norman Bridge Physics Laboratory. At Caltech his research centered on "cosmic rays," a term he invented to describe high energy particles that strike the Earth's atmosphere. Millikan remained the Institute's leader as it grew to world renown; he retired in 1945.