Among the _late manifestations_ are neuritis, telangiectasis, and a painful and intractable form of ulceration, any of which may come on months or even years after the cessation of exposure. _Sterility_ may be induced in X-ray workers who are imperfectly protected from the effects of the rays. #Electrical burns# usually occur in those who are engaged in industrial undertakings where powerful electrical currents are employed. The lesions--which vary from a slight superficial scorching to complete charring of parts--are most evident at the points of entrance and exit of the current, the intervening tissues apparently escaping injury. The more superficial degrees of electrical burns differ from those produced by heat in being almost painless, and in healing very slowly, although as a rule they remain dry and aseptic. The more severe forms are attended with a considerable degree of shock, which is not only more profound, but also lasts much longer than the shock in an ordinary burn of corresponding severity. The parts at the point of entrance of the current are charred to a greater or lesser depth. The eschar is at first dry and crisp, and is surrounded by a zone of pallor. For the first thirty-six to forty-eight hours there is comparatively little suffering, but at the end of that time the parts become exceedingly painful. In a majority of cases, in spite of careful purification, a slow form of moist gangrene sets in, and the slough spreads both in area and in depth, until the muscles and often the large blood vessels and nerves are exposed. A line of demarcation eventually forms, but the sloughs are exceedingly slow to separate, taking from three to five times as long as in an ordinary burn, and during the process of separation there is considerable risk of secondary hæmorrhage from erosion of large vessels. _Treatment._--Electrical burns are treated on the same lines as ordinary burns, by thorough purification and the application of dry dressings, with a view to avoiding the onset of moist gangrene. After granulations have formed, skin-grafting is of value in hastening healing.