Caption:
18th century surgeon performing a trepanning operation on a man's head, with various surgical equipment: Jean Louis Petit's lever 2, trestle 3, Valet's pincers 4, cauterizers 5-8, round plaque 9, triangular plaque 10 and handle to mount cauterizer 11. Copperplate engraving by Robert Benard from Denis Diderot's Encyclopedia, Pellet, Geneva, 1779.