British Medical JournalBMJ 1860; s4-1 doi: https://doi.org/10.1136/bmj.s4-1.175.342 (Published 05 May 1860) Cite this as: BMJ 1860;s4-1:342
Log in using your username and password
Log in through your institution
Subscribe from £173 *
Subscribe and get access to all BMJ articles, and much more.
* For online subscription
Access this article for 1 day for:
£38 / $45 / €42 (excludes VAT)
You can download a PDF version for your personal record.