Public Domain Mark
You can use this work for any purpose without restriction under copyright law. Read more about this licence.
Credit
On the therapeutic action of oxygen : with cases proving its singular efficacy in various intractable diseases / by S.B. Birch. 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.