On the physiology of asphyxia and on the anaesthetic action of pure nitrogen / by George Johnson.

Public Domain Mark

You can use this work for any purpose without restriction under copyright law. Read more about this licence.

Credit

On the physiology of asphyxia and on the anaesthetic action of pure nitrogen / by George Johnson. Public Domain Mark. Source: Wellcome Collection.

Provider

This material has been provided by The Royal College of Surgeons of England. The original may be consulted at The Royal College of Surgeons of England.