Ventilation has for its object the
removal of impure air and the supplying of fresh, wholesome air in its
place. Proper ventilation should be secured in all rooms and buildings,
and its importance cannot be overestimated.
In the summer time and in climates which permit of it with comfort,
ventilation may be secured by having the doors and windows open, thus
allowing the fresh air to circulate freely through the house. In stormy
and cold weather, however, some other means of ventilation must be
supplied. If open fires or grates are used for heating purposes, good
ventilation exists, for under such circumstances, the foul and impure air
is drawn out of the rooms through the chimneys, and the fresh air enters
through the cracks of the doors and windows.
Where open fireplaces are not used, several plans of ventilation
may be used, as they all operate on the same principle. Two openings
should be in the room, one of them near the floor, through which
the fresh air may enter, the other higher up, and connected with a
shaft or chimney, which producing a draft, may serve to free the room
from impure air. The size of these openings may be regulated according
to the size of the room.
--Baldwin: _Essential Lessons in Human Physiology_.
THE QUEEN BEE
It is a singular fact, also, that the queen is made, not born. If the
entire population of Spain or Great Britain were the offspring of one
mother, it might be found necessary to hit upon some device by which a
royal baby could be manufactured out of an ordinary one, or else give up
the fashion of royalty.
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