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. This book, "On the existing state of our knowledge of vaccination and revaccination as preventive of small pox," by Alexander Knox, is a replication of a book originally published before 1850. It has been restored by human beings, page by page, so that you may enjoy it in a form as close to the original as possible.