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Ancient Greek philosopher Aristotle was born circa 384 B.C. in Stagira, a small town on the northern coast of Greece that was once a seaport. Aristotle's father, Nicomachus, was court physician to the Macedonian king Amyntas II.
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Starting in 1908, while a professor at the University of Chicago, Millikan worked on an oil-drop experiment in which he measured the charge on a single electron. J.J. Thomson had already discovered the charge-to-mass ratio of the electron.
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He proposed the matter was formed of small pieces.
