Articles Obstetric Memoranda Br Med J 1867; 2 doi: https://doi.org/10.1136/bmj.2.359.442 (Published 16 November 1867) Cite this as: Br Med J 1867;2:442 Article Related content Metrics Responses Peer review Related articles Correction Correction Published: 28 September 1946; Br Med J 2 doi:10.1136/bmj.2.4473.480