water, or powerful chemical or vegetable irritants, but I am more inclined to believe that the sores were produced mechanically, as with a piece of fine sand-paper. Many of the spots had exactly the appearance gotten by a bruise, as when one is thrown down on hard sand or on the pavement. The case is one of very great interest for many reasons, and especially as a number of physicians, including one versed in diseases of the skin, had been entirely baffled as to its true nature, fully regarding it as a very peculiar form of a neurosis of the skin.