This section is from the book "The Lady's Assistant: Family Physician", by P. Davey and B. Law.
Sometimes the sharpness of the urine will fret off the outward skin near the private parts; as will sweating in the wrinkles of the neck, under the arms, and in other places. To remedy this, the parts must first be washed in warm water, and then put the fine powder of ceruss in a rag, and make a little of it out upon the place. When the parts are very fore, dissolve thirty grains of white vitriol in half a pint of water, and dab a little of it on the fore place with a rag.