The great majority of the American people,
owing to sheer ignorance, are, for want of pure air, being poisoned
and starved; the result being weakened constitutions, frequent disease,
and shortened life.
Whenever a family-room is heated by an open fire, it is duly ventilated,
as the impure air is constantly passing off through the chimney, while,
to supply the vacated space, the pure air presses in through the cracks
of doors, windows, and floors. No such supply is gained for rooms
warmed by stoves. And yet, from mistaken motives of economy, as well
as from ignorance of the resulting evils, multitudes of householders
are thus destroying health and shortening life, especially in regard
to women and children who spend most of their time within-doors.
The most successful modes of making "a healthful home" by a full supply
of pure air to every inmate, will now be described and illustrated.
It is the common property of both air and water to expand, become
lighter and rise, just in proportion as they are heated; and therefore
it is the invariable law that cool air sinks, thus replacing the warmer
air below. Thus, whenever cool air enters a warm room, it sinks downward
and takes the place of an equal amount of the warmer air, which is
constantly tending upward and outward.
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