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1866.] of these rooms, sleep in them all night without raising the window or opening the blinds, and leave them to be shut up for other travellers.

The spare chamber of many dwellings seems to be an hermetically closed box, opened only twice a year, for spring and fall cleaning; but for the rest of the time closed to the sun and the air of heaven. Thrifty country housekeepers often adopt the custom of making their beds on the instant after they are left, without airing the sheets and mattresses; and a bed so made gradually becomes permeated with the insensible emanations of the human body, so as to be a steady corrupter of the atmosphere.

In the winter, the windows are calked and listed, the throat of the chimney built up with a tight brick wall, and a close stove is introduced to help burn out the vitality of the air. In a sitting-room like this, from five to ten persons will spend about eight months of the year, with no other ventilation than that gained by the casual opening and shutting of doors. Is it any wonder that consumption every year sweeps away its thousands?—that people are suffering constant chronic ailments,—neuralgia, nervous dyspepsia, and all the host of indefinite bad feelings that rob life of sweetness and flower and bloom?

A recent writer raises the inquiry, whether the community would not gain in health by the demolition of all dwelling-houses. That is, he suggests the question, whether the evils from foul air are not so great and so constant, that they countervail the advantages of shelter. Consumptive patients far gone have been known to be cured by long journeys, which have required them to be day and night in the open air. Sleep under the open heaven, even though the person be exposed to the various accidents of weather, has often proved a miraculous restorer after everything else had failed. But surely, if simple fresh air is so healing and preserving a thing, some means might be found to keep the air in a house just as pure and vigorous as it is outside.

An article in the May number of "Harpers' Magazine" presents drawings of a very simple arrangement by which any house can be made thoroughly self-ventilating. Ventilation, as this article shows, consists in two things,—a perfect and certain expulsion from the dwelling of all foul air breathed from the lungs or arising from any other cause, and the constant supply of pure air.

One source of foul air cannot be too much guarded against,—we mean imperfect gas-pipes. A want of thoroughness in execution is the sin of our American artisans, and very few gas-fixtures are so thoroughly made that more or less gas does not escape and mingle with the air of the dwelling. There are parlors where plants cannot be made to live, because the gas kills them; and yet their occupants do not seem to reflect that an air in which a plant cannot live must be dangerous for a human being. The very clemency and long-suffering of Nature to those who persistently violate her laws is one great cause why men are, physically speaking, such sinners as they are. If foul air poisoned at once and completely, we should have well-ventilated houses, whatever else we failed to have. But because people can go on for weeks, months, and years, breathing poisons, and slowly and imperceptibly lowering the tone of their vital powers, and yet be what they call "pretty well, I thank you," sermons on ventilation and fresh air go by them as an idle song. "I don't see but we are well enough, and we never took much pains about these things. There's air enough gets into houses, of course. What with doors opening and windows occasionally lifted, the air of houses is generally good enough";—and so the matter is dismissed.

One of Heaven's great hygienic teachers is now abroad in the world, giving lessons on health to the children of men. The cholera is like the angel whom God threatened to send as leader to the rebellious Israelites. "Beware of him, obey his voice, and