Robert Andrews Millikan

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  Robert A. Millikan in 1891
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  Millikan Library at Caltech
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Millikan’s oil-drop experiment

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  Millikan's setup for the oil drop experiment
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  Original Millikan’s oil-drop apparatus.
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  Original Millikan’s oil-drop apparatus with an open lid.
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  Scheme of Millikan’s oil-drop apparatus.
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  Simplified scheme of Millikan’s oil-drop experiment.