Articles

Reviews

Br Med J 1912; 2 doi: https://doi.org/10.1136/bmj.2.2692.235 (Published 03 August 1912) Cite this as: Br Med J 1912;2:235

This is a PDF-only article. The first page of the PDF of this article appears below.

PDF extract preview

Sign in

Log in through your institution

Subscribe