Under the foregoing treatment the disease generally runs its course without any untoward event, and the child recovers perfectly. Sometimes, however, although the patient is quite well, and the disease on the decline, the cough still continues. In these cases, and at this time, it is that change of air often proves so very serviceable. The sea-side is preferable, if the season of the year permit; and salt- water bathing, commencing with the warm or tepid bath, and passing gradually to the cold-bath (if no complication forbid it), will also prove certainly and rapidly remedial. Crying, mental irritation, or opposition, frequently bring on a fit; and even the sight of another in a paroxysm will induce it in those affected by the disease. Running or other active exercise will generally cause the fits to be more severe. Young children, too, must be carefully watched at night, and be raised up by the nurse as soon as the fit is threatened. These hints the mother should bear in mind. So much for the simple form of the disease, and that in which it most frequently and commonly presents itself to our notice: a mild disease; and, if carefully managed and watched over, certainly not a dangerous one. Of what, then, is a parent to be afraid, or against what is she to guard? Lest other disease insidiously come on, and advance to an irremediable degree, masked by the cough, without attracting her attention. This is the great source of danger in hooping-cough. The physician, in a case of simple hooping-cough, is not in daily attendance upon his patient, and therefore not present to notice the commencement or first symptoms of those diseases which so frequently occur at this time, and the successful treatment of which will mainly depend upon their early detection, and the decision with which they are treated. When you hear of a child or several children in a family dying of hooping-cough, it is not this disease which proves fatal; but death is caused by some disease of lungs or brain, which has been super-added to the hooping-cough. The progress of hooping-cough, then, must be closely attended to by the parent, even in the most favourable cases.