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Esclangon, Ernest‐Benjamin

Born Mison, Alpes de Haute‐Provence, France, 17 March 1876

Died Eyrenville, Dordogne, France, 28 January 1954

Ernest Esclangon is often remembered for his contributions to applied physics during World War I, and for his automated distribution of time signals by telephone.

Esclangon began his studies in a collège (school) in Manosque, his brother being a schoolmaster. He later attended the lycée (academy) in Nice before entering the École Normale Supérieure in Paris (1895). He received his degree in mathematics and secured a position at the Bordeaux Observatory in 1899 under Georges Rayet , which decided the fate of his career. There, Esclangon served as aide‐astronome and astronome adjoint. While in Bordeaux, he taught courses in rational mechanics as well as in differential calculus.

In 1919, Esclangon became director of the Strasbourg Observatory. With help from André Danjon , he revived the institution in the postwar period. Esclangon then succeeded