It is important for every housekeeper to know that the health of a family very much depends on the _purity_ of water used for cooking and drinking. There are three causes of impure and unhealthful water. One is, the existence in it of vegetable or animal matter, which can be remedied by filtering through sand and charcoal. Another cause is, the existence of mineral matter, especially in limestone countries, producing diseases of the bladder. This is remedied, in a measure, by boiling, which secures a deposit of the lime on the vessel used. The third cause is, the corroding of zinc and lead used in pipes and reservoirs, producing oxides that are slow poisons. The only remedy is prevention, by having supply-pipes made of iron, like gas-pipe, instead of zinc and lead; or the lately invented lead pipe lined with tin, which metal is not corrosive. The obstacle to this is, that the trade of the plumbers would be greatly diminished by the use of reliable pipes. When water must be used from supply-pipes of lead or zinc, it is well to let the water run some time before drinking it, and to use as little as possible, taking milk instead; and being further satisfied for inner necessities by the water supplied by fruits and vegetables. The water in these is always pure. But in using milk as a drink, it must be remembered that it is also rich food, and that less of other food must be taken when milk is thus used, or bilious troubles will result from excess of food. The use of opium, especially by women, is usually caused at first by medical prescriptions containing it. All that has been stated as to the effect of alcohol in the brain is true of opium, while to break a habit thus induced is almost hopeless. Every woman who takes or who administers this drug is dealing as with poisoned arrows, whose wounds are without cure. The use of tobacco in this country, and especially among young boys, is increasing at a fearful rate. On this subject we have the unanimous opinion of all medical men, the following being specimens. A distinguished medical writer thus states the case: “Every physician knows that the agreeable sensations that tempt to the use of tobacco are caused by _nicotine_, which is a rank poison, as much so as prussic acid or arsenic. When smoked, the poison is absorbed by the blood of the mouth, and carried to the brain. When chewed, the nicotine passes to the blood through the mouth and stomach. In both cases, the whole nervous system is thrown into abnormal excitement to expel the poison, and it is this excitement that causes agreeable sensations. The excitement thus caused is invariably followed by a diminution of nervous power, in exact proportion to the preceding excitement to expel the evil from the system.”