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Georges Sagnac
French physicist who lent his name to the sagnac effect.
Born October 14th, 1869 in Périgueux. [ref]
Died February 26th, 1928 at 58 years old in Meudon.
Occupations
physicist, university teacher
Wikipedia
The day which we fear as our last is but the birthday of eternity. Lucius Annaeus Seneca