Perpetual calendar, English, 1822-1869.

Image number: 10412938

Perpetual calendar, English, 1822-1869.

This calendar was designed for calculating the time of parturition (childbirth) and is made out of wood and ivory. The outer wheel is divided into four parts labelled: Conception, Quickening, Foetus Viable, and Parturition. It was manufactured by Ferguson at St Bartholomew's Hospital, London.

Image number:
10412938
Credit:
Science Museum/Science & Society Picture Library
Date taken:
30 October 2003 10:43
Image rights:
Science Museum