A new-born babe laboring under hooping-cough is liable to convulsions, which is, in this disease, one, indeed the great, source of danger. A child, too, who is teething, and laboring under the disease, is also liable to convulsions. When the patient is convalescing, care ought to be taken that he does not catch cold, or the “hoop” might return. Hooping-cough may either precede, attend, or follow an attack of measles. 230. _What is the treatment of Hooping-cough?_ We will divide the hooping-cough into three stages, and treat each stage separately. _What to do._—_In the first stage_, the commencement of hooping-cough: For the first ten days give the ipecacuanha wine mixture, a teaspoonful three times a day. (For the prescription of the ipecacuanha wine mixture, see question 202.) If the child be not weaned, keep him entirely to the breast; if he be weaned, to a milk and farinaceous diet. Confine him for the first ten days to the house, more especially if the hooping-cough be attended, as it usually is, with more or less of bronchitis. But take care that the rooms be well ventilated, for good air is essential to the cure. If the bronchitis attending the hooping-cough be severe, confine him to his bed, and treat him as though it were simply a case of bronchitis. (For the treatment of bronchitis, see question 205.) _In the second stage_, discontinue the ipecacuanha mixture, and give Dr. Gibb’s remedy—namely, nitric acid—which I have found to be an efficacious and valuable one in hooping-cough: Take of—Diluted Nitric Acid, two drachms; Compound Tincture of Cardamoms, half a drachm; Simple Syrup, three ounces; Water, two ounces and a half: Make a Mixture. One or two teaspoonfuls, or a tablespoonful, according to the age of the child—one teaspoonful for an infant of six months, and two teaspoonfuls for a child of twelve months, and one tablespoonful for a child of two years, every four hours, first shaking the bottle. Let the spine and the chest be well rubbed every night and morning either with Roche’s Embrocation, or with the following stimulating liniment (first shaking the bottle): Take of—Oil of Cloves, one drachm; Oil of Amber, two drachms; Camphorated Oil, nine drachms: Make a Liniment. Let him wear a broad band of new flannel, which should extend round from his chest to his back, and which ought to be changed every night and morning, in order that it may be dried before putting on again. To keep it in its place it should be fastened by means of tapes and with shoulder-straps. The diet ought now to be improved—he should gradually return to his usual food; and, weather permitting, should almost live in the open air—fresh air being, in such a case, one of the finest medicines.