Studies of scales from the wings of butterflies viewed by microscope, under magnification. Nine specimens lettered a-h, with an inset detail at natural size.
Plate 9 from 'Amusement microscopique, tant pour l'esprit que pour les yeux, contenant... estampes... d'apres nature...' by Martin Frobene Ledermuller, plates volume (Adam Wolfgang Winterschmidt, Nuremburg, 1764).
Copperplate engraving.