Jean Henri Hassenfratz
Jean Henri Hassenfratz (20 December 1755 – 26 February 1827) was a French chemist, physics professor, mine inspector, and participant in the French Revolution. In 1794, Hassenfratz took part (with Monge) in the creation of the École Polytechnique (first known as École centrale des travaux publics). Hassenfratz became its first professor of physics, a position he held until 1815, when he was succeeded by Alexis Petit (a former child prodigy and Polytechnique alumni who would soon discover the Dulong–Petit law, in 1819). External links Hassenfratz's (1802) "Sur les Ombres colorées," Journal de l'Ecole polytechnique, ou Bulletin du travail fait à cette école, ser. 1, vol. 4, p. 272 - 283 - digital facsimile from the Linda Hall Library 1755 births 1827 deaths 19th-century French chemists Scientists from Paris 18th-century French chemists Academic staff of École Polytechnique