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15 Jul 1909 Jahr - Oil Drop Experiment: Performed by Robert A. Millikan and Harvey Fletcher; Observing tiny electrically charged droplets of oil located between two parallel metal surfaces, forming the plates of a capacitor to measure the electric charge of an electron; Offered convincing proof that electric charge exists in basic natural units

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Atomic Theory Timeline Project

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15 Jul 1909 Jahr
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~ 116 years ago

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