A snake oil recipe from 1719/1751 (Juan de Loeches, Tyrocinium Pharmaceticum), printed in Spain: "The viper oil of Mesues. Take 2 pounds of live snakes and 2 pounds 3 ounces of sesame oil. Cook slowly, covered in a glazed pot, until meat pulls away from the bone. Strain and store. Uses: Cleans the skin, removes pimples, impetigo, and other defects."