Articles Preparations and Appliances Br Med J 1937; 1 doi: https://doi.org/10.1136/bmj.1.3970.273 (Published 06 February 1937) Cite this as: Br Med J 1937;1:273 Article Related content Metrics Responses Peer review Related articles Correction Corrigenda Published: 20 February 1937; Br Med J 1 doi:10.1136/bmj.1.3972.430-b