Sores and Ulcers, the Potato Lotion for

"Take the water you boil potatoes in and in one quart of it boil one ounce of foxglove leaves for ten minutes, then add one ounce tincture of myrrh to the lotion, bathe the affected parts with the lotion warm, then keep a cloth wet with it on the sore, if possible, until cured."

Source: Mother's Remedies: Over One Thousand Tried and Tested Remidies from Mothers of the United States and Canada, T. J. Ritter