Michel Eugène Chevreul,(1780-1889), medal, centenary of the birth of the French chemist, by Oscar Roty, 1886. MICHEL EVGENE CHEVREUL MEMBER OF THE ACADEMY OF SCIENCES Cast bronze, 197 mm, unsigned, single-sided, with a few spots of oxidation. This module of the medal, which is in the Musée d'Orsay and the BnF, is unusual.