_Causes._—Exposure to a cold, damp atmosphere, indigestion, or irritation of the throat. There may be some hoarseness a few hours preceding the attack and the child awakens suddenly in the paroxysm of the sharp croup cough, experiences difficulty in breathing and has the cyanotic appearance so terrifying to the mother, but which need give no cause for serious alarm. _Treatment._—Apply hot compresses about the throat. If the attack is severe give an emetic—one dram of salt or mustard in one-half cup of warm water, and repeat in twenty minutes if necessary; an enema of warm water should be given and steam inhalation resorted to. Keep the child in an even temperature, restrict diet for a few days, and keep bowels active. =Parotitis (Mumps).=—An infectious disease characterized by inflammation of the parotid glands. Incubation is from two to three weeks. _Symptoms._—The disease comes on with a mild chill, pain below the ear and swelling of the glands. There is great discomfort and the tension is very disagreeable. _Treatment._—Keep patient in bed during the height of the disease. Give liquid and soft diet. Bowels should be opened freely. No medicine is required unless fever is high. Apply cold compresses to the affected part, though, if preferred, hot ones may be used. A pad of cotton with oiled silk is the best application. In cases of extreme redness or tenderness of the glands, leeches may be applied. In cases of delirium use the ice-cap. For orchitis, lubricate the parts with camphorated oil and support with a soft cotton pad. Duration of disease, from seven to ten days. =Whooping-Cough.=—An infectious disease, beginning with catarrh of the air-passages, like an ordinary cold. The short expiratory coughs following each other in rapid succession and the period of drawing a long breath give rise to the whoop characterizing pertussis. _Incubation._—A week to ten days. _Treatment._—Isolate patient and if attack is severe put him in bed. Fresh air is the most essential element. If the cough is distressing, ipecacuanha wine and paregoric may be given. During convalescence the child should be watched carefully, as at this period bronchopneumonia and tuberculosis are apt to develop. Change of air is advisable. Tonics and cod-liver oil should be employed. The diet should be easily digestible, nourishing food. After each paroxysm and after the child has recovered from the exhaustion it produces give nourishment. There will be a partial if not complete absorption of the food before another attack. Duration of the disease from six to twelve weeks. =Colic.=—_Causes._—Constipation, indigestible foods, flatus, overfeeding, improper foods and exposure to cold. _Symptoms._—Child cries out very suddenly and sharply. There is a convulsive movement of the extremities, the hands are tightly closed, abdomen is tense.