Iron Moulds
Take strong spirits of salts, and dipping the finger in it, daub the stain with acid, letting it rest until it is removed. If the spot has been frequently washed, it will be hard to move; in this case put on a little salt of sorrel and then rub it well with a slice of lemon. Then wash it in hot soap and water, and rinse it, and again with salt of sorrel and lemon; or, add to it the tincture of galls, till it turns black; let it dry, then apply salt of sorrel and lemon: sometimes one and sometimes the other answers.