Flea under the microscope. Etching of 1780 approximately. Size of the engraved part 33.5 cm x 43.2. Picture of a flea under the microscope according to the micrograph of Hook. Extracted from the first edition of "L'Encyclopedie" of Diderot and D'Alembert. Engraved by R. Benard, engraver active in France between 1750 and 1780.