Portrait : Belohnung der Jugend ['Reward Youth/Virtue'] Lieberkuhn. Etching by GFS, 1757. With microscope and medical motifs. Portrait, commemorating a man of medicine; HS portrayed in roundel inscribed D: L.N. LIEBERKUHNS, held and garlanded by comely woman, surrounded by medical devices and artefacts including books, serpent on staff, plants; left foreground, stoppered flask and microscope; outlined in wall background, roundels of Gallien and others [i.e. Johann Nathanael Lieberkuehn]