Public Domain Mark
You can use this work for any purpose without restriction under copyright law. Read more about this licence.
Credit
Anaesthesia; who made and developed this great discovery. Public Domain Mark. Source: Wellcome Collection.
Provider
This material has been provided by the Harvey Cushing/John Hay Whitney Medical Library at Yale University, through the Medical Heritage Library. The original may be consulted at the Harvey Cushing/John Hay Whitney Medical Library at Yale University.