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Wilhelm Hallwachs
Physicist, photoelectric effect (1859-1922).
Born July 9th, 1859 in Darmstadt.
Died June 20th, 1922 at 62 years old in Dresden.
Occupations
physicist, university teacher
Wikipedia
As you get older, three things happen: The first is your memory goes, and I can't remember the other two. Norman Wisdom