_In the third stage_, that is to say, when the complaint has lasted a month, if by that time the child is not well, there is nothing like change of air to a high, dry, healthy, country place. Continue the nitric acid mixture, and either the embrocation or the liniment to the back and the chest, and let him continue to almost live in the open air, and be sure that he does not discontinue wearing the flannel until he be quite cured, and then let it be left off by degrees. If the hooping-cough have caused debility, give him cod-liver oil, a teaspoonful twice or three times a day, giving it him on a full stomach after his meals. But, remember, after the first three or four weeks, change of air, and plenty of it, is for hooping-cough the grand remedy. _What_ NOT _to do_.—Do not apply leeches to the chest, for I would rather put blood into a child laboring under hooping-cough than take it out of him—hooping-cough is quite weakening enough to the system of itself without robbing him of his life’s blood; do not, on any account whatever, administer either emetic tartar or antimonial wine; do not give either paregoric or syrup of white poppies; do not drug him either with calomel or with grey powder; do not dose him with quack medicine; do not give him stimulants, but rather give him plenty of nourishment, such as milk and farinaceous food, but _no_ stimulants; do not be afraid, after the first week or two, of his having fresh air, and plenty of it—for fresh, pure air is the grand remedy, after all that can be said and done, in hooping-cough. Although occasionally we find that if the child be laboring under hooping-cough and is breathing a pure country air, and is not getting well so rapidly as we could wish, change of air to a smoky, gasladen town will sometimes quickly effect a cure; indeed, some persons go so far as to say that the _best_ remedy for an _obstinate_ case of hooping-cough is for the child to live the great part of every day in gas-works! 231. _What is to be done during a paroxysm of Hooping-cough?_ If the child be old enough, let him stand up; but if he be either too young or too feeble, raise his head, and bend his body a little forward; then support his back with one hand, and the forehead with the other. Let the mucus, the moment it is within reach, be wiped with a soft handkerchief out of his mouth. 232. _In an obstinate case of Hooping-cough, what is the best remedy?_ Change of air, provided there be no active inflammation, to any healthy spot. A farm-house, in a high, dry, and salubrious neighborhood, is as good a place as can be chosen. If, in a short time, he be not quite well, take him to the sea-side: the sea breezes will often, as if by magic, drive away the disease. 233. _Suppose my child should have a shivering fit, is it to be looked upon as an important symptom?_