French mathematician, mecanician and clockmaker.
Production of edifice clocks.
1838 to 1842
Construction of the third astronomical clock of Strasbourg cathedral (with Albert and Théodore Ungerer). Combining mathematical solutions and ingenious mechanical solutions such as a celestial globe with equinox precession, solar and moon equations and an ecclesiastic comput (calendar); it is considered to be one of the most sophisticated and complex monumental clocks.