Trepanning set, English, c 1750s.
© Science Museum / Science & Society Picture Library
Trepanning is the removal of a piece of bone from the skull. The instruments are of a type introduced by Samuel Sharp (1700-1778) of Guy's Hospital, who wrote 'Treatise on the operation of surgery' (1739). The box is identical to those used by the London scientific instrument maker Benjamin Martin (1704-1782).