On 8 May 1794, after a trial that lasted less than a day, a revolutionary tribunal condemned Lavoisier, who had saved Lagrange from arrest, and 27 others to death. Lagrange said on the death of Lavoisier, who was guillotined on the afternoon of the day of his trial:
Lagrange sinabi sa kamatayan ng Lavoisier, na siyang guillotined sa hapon ng araw ng kanyang paglilitis: