MEDAL FROM THE POSSESSION OF OTTO WALLACHS WITH A PORTRAIT OF MICHEL-EUGENE CHEVRAL (1786–1889), Professor of Applied Chemistry at the Musée d’Histoire Naturelle Paris, Oscar Roty, 1886, bronze, Museum of Göttingen Chemistry, University of Göttingen
MEDAL FROM THE POSSESSION OF OTTO WALLACHS WITH A PORTRAIT OF MICHEL-EUGENE CHEVRAL (1786–1889), Professor of Applied Chemistry at the Musée d’Histoire Naturelle Paris, Oscar Roty, 1886, bronze, Museum of Göttingen Chemistry, University of Göttingen