This section is from the book "Smith's Family Physician", by William Henry Smith. See also: Natural Physician's Healing Therapies: Proven Remedies that Medical Doctors Don't Know.
Warts are so well known that they need very little description. When they are situated on an exposed part of the skin, the cuticle is thick, and they are generally dry, hard, and insensible; but when they are situated at the upper part of the thigh, where two surfaces of the skin are in contact, their cuticle is thin, and they exude a serous discharge, which is contagious. They frequently follow Gonorrhoea and Syphilis, especially in women; but although their secretions are contagious, they have nothing of a syphilitic nature, and require no Mercury. They often come on the hands of children; last for a time, and then disappear. But sometimes successive crops will keep coming out, one after the other, for some time.
If they become an eye-sore, they may readily be removed by touching their surface, once in a day or two, with a little strong Nitrie Acid; (taking care not to let the Acid touch the skin.) This will cause them to turn of a golden yellow colour, and eventually to crumble away.