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The Child's Day by Woods Hutchinson
page 40 of 136 (29%)
lessons are so long and tiresome. Then, if your teacher will throw
open all the windows and have you stand up, or, better still, march
around the room singing or go through some drill or calisthenic
exercises, you will soon feel quite fresh and rested again.

In the mild weather of the spring or early fall, all you need to do to
keep the air fresh in the schoolroom is to keep the windows well open
at the top. But in the winter, the air outdoors is so cold that it has
to be heated before it is brought in; and this, in any modern and
properly built schoolhouse, is usually arranged for. The fresh air is
drawn in through an opening in the basement and is either heated, so
that it rises, or is blown by fans all over the building. This sort of
fresh air, however, is never quite so good as that which comes
directly from outdoors; so it is generally best to keep at least two
or three windows in each room opened at the top as well, and never to
depend entirely upon the air that comes through the heating system.

Sometimes this may mean a little draft, or current of uncomfortably
cool air, for one or two of you who sit nearest the windows; but your
teacher will always allow you to change your seat if this proves very
unpleasant. If you have plenty of warmth in the room you sit in,
unless the air outside is very cold, this "breeze" won't do you any
harm at all; on the contrary, it will be good for you. Instead of
catching cold from a draft like this, it is from foul, stuffy,
poisonous air, loaded with other people's breaths and the germs
contained in them, that you catch cold.

[Illustration: GARDENS TAKE US OUT OF DOORS]

In fact, staying indoors is usually the reason why people are sick.
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