Dr. S. P. Hullihen, of Wheeling, Va., has discovered a method whereby the cavities of teeth over exposed nerves may be successfully plugged up. It is this:—The diseased parts of the tooth are removed to make it apparent that the nerve is exposed. The fang is then perforated through the gum, into the nerve cavity. The opening should be of about the size of a small knitting needle; its object is to open the blood vessels ot the nerve, which will at once be known by the flow of arterial blood. The cavity of the tooth may then be filled without the least fear of pain or ill consequences. This plan has been successfully practiced in a great number of cases. Hitherto a tooth having an exposed nerve could not be filled and prevent pain and toothache.