Articles Scotland Br Med J 1935; 2 doi: https://doi.org/10.1136/bmj.2.3887.34 (Published 06 July 1935) Cite this as: Br Med J 1935;2:34 Article Related content Metrics Responses Peer review Related articles Correction Corrections Published: 31 July 1965; Br Med J 2 doi:10.1136/bmj.2.5456.110