A treatise on the cow-pox; containing the history of vaccine inoculation, and an account of the various publications which… https://www.rawpixel.com/image/13974661/image-paper-cow-bookFree Image from public domain licenseA treatise on the cow-pox; containing the history of vaccine inoculation, and an account of the various publications which… https://www.rawpixel.com/image/13993641/image-cow-book-artFree Image from public domain license