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Vladimir Karapetoff (1876-1948), Russian-US electrical engineer and educator. Born and educated in St Petersburg, Russia, Karapetoff first came to the USA in 1902. He became a fellow of the Institute of Electrical and Electronics Engineers, and taught at Cornell University, New York, for 35 years. (KEYSTONE/SCIENCE PHOTO LIBRARY/LIBRARY OF CONGRESS/SCIENCE PHOTO LIBRARY)