COPYRIGHT CALIFORNIA INSTITUTE OF TECHNOLOGY / EMILIO SEGRE VISUAL ARCHIVES / AMERICAN INSTITUTE OF PHYSICS / SCIENCE PHOTO LIBRARY COPYRIGHT CALIFORNIA INSTITUTE OF TECHNOLOGY / EMILIO SEGRE VISUAL ARCHIVES / AMERICAN INSTITUTE OF PHYSICS / SCIENCE PHOTO LIBRARY
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Millikan family in Germany, with bicycles, circa 1912. At left is US physicist Robert Andrews Millikan (1868-1953), with his wife Greta (nee Blanchard, 1878-1953). They married in 1902 and had three sons. At right is their second son Glenn Allan Millikan (1906â1947) who is aged 6 here. Robert Millikan's research at the University of Chicago between 1909 and 1913 determined the charge on an electron, work for which he was awarded the 1923 Nobel Prize in Physics. Glenn Millikan went on to become a physiologist, inventing the first practical, portable pulse oximeter in the early 1940s as part of wartime research to monitor oxygen levels in pilots.
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