Feeding must be stopped at once. No food of any kind should be given for at least twenty-four hours, or until the tendency to vomit subsides. The thirst must be allayed, however, so we give frequently small quantities of thin barley water or albumen water or cold boiled water. If these are vomited we must stop giving them altogether for twenty-four hours. If the fever is high and the skin dry, the child should be given a cool pack, 85 deg. to 90 deg. F., which can be moistened every half hour with water at this temperature; this will often control the fever satisfactorily. Hot-water bottles should be placed at the feet if they are cold. If, on the other hand, the fever is very low (below normal), the child's circulation poor, the skin blue and cold, a hot-water bath at 108 deg. F., for five minutes (rubbing the surface of the body while in the bath), will be of very great service. The bath may be repeated at half-hour intervals. If the patient is a breast-fed infant it can be allowed to nurse after the twenty-four-hour rest. The length of time it is permitted to stay at the breast should be about one-quarter of the time it was allowed before the attack began. If it does not vomit, the nursing can be repeated every four hours. As the case progresses toward recovery the interval between feedings can be shortened. Care, however, must be taken not to shorten the interval too rapidly. If the patient is artificially fed and is not over four months old, a substitute for the milk must be found. The best substitutes are rice or barley water, either plain or dextrinized, the malted foods, chicken or beef broths, liquid peptonoids or bovinine. Water (boiled and cooled) may be allowed at all times if not vomited. Older children are treated in the same way. All food is withheld while there is any vomiting. When vomiting stops begin with small quantities of beef broth, or chicken, or veal broth. Later kumyss or matzoon can be tried, and finally thin gruels made with milk. If vomiting persists the stomach must be washed out; this can be done by giving the infant or child a large drink of cool boiled water. This will be immediately vomited and it will clean the stomach at the same time. The stomach-pump may be used to better advantage. One washing is usually sufficient. The vomiting will stop after the stomach has been washed out and the patient may then be given, frequently, small quantities of cold albumen water or barley water. The bowel should be thoroughly cleaned out at the beginning of every summer diarrhea. Castor oil or calomel are the two best cathartics for this purpose. If the stomach is not upset use castor oil. If the stomach is upset use calomel; one-fourth of a grain every hour for eight doses will be sufficient. Give enough, however,--there is no danger at the beginning of the attack of too free movements of the bowel. Whatever cathartic is given, it should produce green, watery stools.