PHYSIONOTRACE - "Portrait of a young girl, right profile". 19th century. Portrait engraved with a physionotrace by Chrétien (1754-1811), after a drawing by Fouquet. Wove paper. Margins. The physionotrace was a machine invented in 1784 or 1785 by Gilles-Louis Chrétien that enabled life-size pastel portraits to be drawn "mechanically". These portraits, called "grand trait", were then etched on a copper plate. 13 x 8.5 cm. Condition A (good).