HEALTH AMD HYGIENEIMPORTANCE OF ALWAYS HAVINGCLEAN HANDS.To Insuro Good Teeth—The SmokingHabit—Warnin'; to Housekeepers—Poison, and Various Notes.Smoking.—Sir Morell Mackenzie concluded an article in the New Review on Smoking, with a little practical advice. A person should never smoke, he says, except after a substantial meal, and if he be a singer or speaker, only after, and not before, using his voice. Let him refrain from smoking pipe, cigar or cigarette to the bitter and, it may be added, rank and oily end. Let him smoke a mild cigar or a long-stemmed pipe charged with some cool smoking tobacco. If he will sinoke a cigarette, let it be smoked through a mouthpiece, which is kept clean with ullra-Mohammedan strictness. Let the singer who wishes to keep in the perfect way, refrain from inhailing the smoke. Let him take it as an axiom that the man in whom tobacco increases the flow of saliva to auy marked degree is not intended by nature to smoke. If he is strictly moderate in indulgence—the precise limits each one must settle for himself- he will get all the good effects of the soothing plant without the banc which lurks in it when used to excess. —New York Medical Times.To Insure Good Teeth.—Begin with theinfant to lay the foundation for good teeth, by giving the little one regular attention, particularly in regard to its food. Indigestion causes faulty nutrition—poor nutrition produces nothing good. The growth of teeth is mainly limited to childhood—their condition is profoundly influenced by children’s diseases. More than the diet must be watched. The teeth themselvesshould be filled. This guards against disease of the bony portion cf the jaw into which the roots of the teeth are inserted an«l against an unsynimetrical growth of the jaw itself. A baby’s mouth after the first tooth appears should be bathed twice a day with a soft rag and lime water. Rubbing is needful along the gums. Frequent visits to the dentist are necessary allA a a » m ^ •Fmetallic salts, such as those of A'ntimohy, lead, copper, zinc, chromium, gamboge and aloes. Colocynth and eroton oil are good examples of vegetable irritants and cantharides of animal irritants. Animal and vegetable matters when in process of decomposition, or when infested with certain organisms known as bacteria, may produce violent irritant symptoms. The symptoms produced by irritant poisons are usually more slow' in their development than where a corrosive poison has acted.Arsenic is a specific irritant poison. Almost all the compounds of this metal are poisonous. The term arsenic is most commonly applied, not to tho metal itself, but to its lower oxide, arsenious oxide, which is also known as white arsenic. Another ofthe irritant poisons is lead. The salts oflead, especially the acetate or sugar of lead, are poisons of no great activity, while chrome yellow, or lead chromate, is a powerful ir-■ ritant poison. All chromates are, indeed, irritant poisons. The soluble salts of cop-I per, such as blue vitriol (the sulphate) and verdigris (subcarbonatc and subacetate) are emetic and irritant salts. Rinc salts and barium salts, except the insoluble barium sulphate, are irritant poisons. Tho chro-mates, such as bichromate of potash, etc., are violent irritants. Phosphorus has two chief forms—the yellow or ordinary and the red or amorphous, the former of which only is poisonous. The vegetable irritants produce drastic purgative effects.It is impossible at present to attempt a systematic division of the neurotic poisons, as they embrace poisons so widely different in their action. Prussic or hydrocyanic acid is one of the best-known poisons ot this class, and a very deadly one. In the pure-state it is said to kill with lightning-like rapidity. It is met with in commerce only in the diluted state. Other soluble cyanides, especially cyanide of potassium, are equally poisonous.| Opium is another neurotic poison, but it | is too well known to need further descrip-I tion. Strychnine and all strychnine-producing plants (it is mainly derived from the strychnos nux vomica plant) all act in the same manner. This is one of the most fatal and agonizing of all the vegetable or mineral poisons, throwing the body into the most violent, racking convulsions, and producing, in fact, all the outward symptoms of tenanus.—The American An-uI