Pierre Louis Moreau de Maupertuis. Dated: 1741. Dimensions: plate: 51.8 x 35.7 cm (20 3/8 x 14 1/16 in.) sheet: 53.5 x 37.3 cm (21 1/16 x 14 11/16 in.). Medium: engraving on laid paper. Museum: National Gallery of Art, Washington DC. Author: Jean Dau