Articles Notes on Books Br Med J 1927; 2 doi: https://doi.org/10.1136/bmj.2.3476.311 (Published 20 August 1927) Cite this as: Br Med J 1927;2:311 Article Related content Metrics Responses Peer review Related articles Correction Correction Published: 16 August 1958; Br Med J 2 doi:10.1136/bmj.2.5093.462 Correction Correction Published: 07 August 1965; Br Med J 2 doi:10.1136/bmj.2.5457.376