Nobel Prize–winning physicist (1868–1953) who was the first to isolate the electron and measure its charge. Signed book: The Autobiography of Robert A. Millikan. First edition. NY: Prentice-Hall, 1950. Hardcover, 6.25 x 9.25, 311 pages. Signed and inscribed on the first free end page in blue ballpoint, “Inscribed by the author Robert A. Millikan to his most constant and effective collaborator for thirty years in the Caltech job, Edward C. Barrett, Aug. 8, 1950.” In fine condition, with scattered marks and dings to the spine and cover. RR Auction COA.