author
J. H. (Jean-Henri) Hassenfratz
1755–1827
A self-taught French chemist and physicist, he rose from a working-class background to become a professor, mine inspector, and an active figure in the French Revolution. He is especially remembered as one of the early builders of the École Polytechnique and for helping bring practical science into public life.
1 Audiobook
Journal de la société de 1789 - Nº II
by marquis de Jean-Antoine-Nicolas de Caritat Condorcet, Philippe-Antoine Grouvelle, J. H. (Jean-Henri) Hassenfratz, Louis-François-Dominique-Norbert Pressac de la Chagnaye
About the author
Born in Paris in 1755, Jean-Henri Hassenfratz began life far from the usual academic path. He trained first as a carpenter, then moved into the study of mining, chemistry, and physics, building a reputation through practical skill as well as scientific curiosity.
He worked closely with the scientific world of late eighteenth-century France and became associated with Antoine Lavoisier's circle. During the Revolution, he took on public roles as a mine inspector and political participant, and in 1794 he helped create the school that became the École Polytechnique, where he served as its first professor of physics.
Hassenfratz died in Paris in 1827. Today he is remembered as a figure who connected hands-on technical knowledge with the new scientific institutions of Revolutionary France, helping shape how engineering and applied science were taught to the next generation.