Public Domain Mark
You can use this work for any purpose without restriction under copyright law. Read more about this licence.
Credit
On the existing state of our knowledge of vaccination and revaccination as preventive of small pox : being a comprehensive practical examination of the subject, as recently published in nos. XXIII and XXIV of The London Journal of Medicine / by Alexander Knox. Public Domain Mark. Source: Wellcome Collection.
Provider
This material has been provided by the Francis A. Countway Library of Medicine, through the Medical Heritage Library. The original may be consulted at the Francis A. Countway Library of Medicine, Harvard Medical School.