Diarrhœa is the most common trouble during the teething period, and is deserving of the most generous treatment. Should the food seem to disturb the stomach and pass away undigested, or in pieces, with some degree of sourness, the pulverized magnesia in from three to five-grain doses, once or twice a day, will correct it; after which gum-water, or milk, made like gruel, with flour, should be the chief diet till relieved. No fresh fish or eggs should be allowed in time of diarrhœa. Should the discharges continue, frequent drinks of a decoction of blackberry or raspberry leaves, or what is just as well, the juice of those ripe fruits, may be given in spoonful-doses. Also the fine lean corned beef, rolled or pounded fine and fed slowly in small quantities—say a tablespoonful during the day—will frequently arrest the whole trouble; emptiness, it will be remembered, being an exciting cause of diarrhœa as much as overfeeding. There will be emptiness if a continual nibbling is allowed, with the smallest chance of ever getting a substantial meal. Usually, in the diarrhœa of teething, there is great thirst, which may best be abated by giving plentifully of thin, cool gum-arabic water, no sugar. It is this everlasting sugar sweetening that creates fermentation at such times. It is the over-indulgence in objectionable food that causes much of the bowel complaint in teething, rather than the teething itself. We are aware that the pain caused by a coming tooth is annoying, yet this is no reason why children cannot be kindly prohibited from grasping and tasting everything they seem to see or cry for. Children are very sensitive to odors, therefore cooking and eating should be done as remote from them as possible. In this matter, however, many of the laboring classes and indigent are deserving of sympathy; being either from choice, or ill-fortune, huddled together in close tenements, where each can smell what the other is cooking. And it is next to impossible for them to better the future condition or prospects of their offspring while continuing to live so. It may not be unprofitable to insert here what I have frequently suggested as a sanitary measure: that is, for families to make it a rule not to occupy the last room at the top of the house, even for storing goods; as carpets, trunks, hanging garments or curtains, and bedding catch and retain the odors ascending from below. Smoke, gases, dusts, breaths of inmates, steam, the odors arising from old drains, or fever patients, all go to the top of a building, and if there is no outlet it must stop there and endanger the health of persons occupying it. By leaving one room vacant, a window in it could be continually open and no one would suffer from bad air. A skylight in the roof would answer the same purpose, but these are scarcely ever opened. WHOOPING-COUGH.