Science: Electron Speeds

By a clever device Chairman Robert Andrews Millikan of the California Institute of Technology was able to measure the electrical charge of the electron, the indivisible unit of all electricity. For that Dr. Millikan won a 1923 Nobel Prize. Last week two other Caltech men—Jesse W. M. du Mond and Harry Kirkpatrick— reported the perfection of another device, to measure the speed of electrons moving within atoms. A serviceable description of the structure of an atom is this: At its core are, according to the particular kind of atom, 1 to 238 protons...

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