Articles Reports of Societies Br Med J 1881; 2 doi: https://doi.org/10.1136/bmj.2.1071.49 (Published 09 July 1881) Cite this as: Br Med J 1881;2:49 Article Related content Metrics Responses Peer review Related articles Correction Errata Published: 16 September 1893; Br Med J 2 doi:10.1136/bmj.2.1707.664 Correction CORRIGENDUM Published: 24 September 1938; Br Med J 2 doi:10.1136/bmj.2.4055.689-a