This is not so. The irritability comes from within, not from without.
After becoming accustomed to good ventilation at night it is almost
impossible to enter into restful slumbers in a stuffy room.
Savages are singularly free from respiratory diseases, and the reason is
without doubt that they do not house themselves closely. In some parts
of the world they fear to let civilized men enter their abodes, for they
may bring respiratory diseases.
Not only the homes, but public places, such as street cars, theaters,
schools and churches are too often poorly ventilated. Sleeping, or
rather dozing in church is so common that it is a matter of jest. My
experience has been that drowsiness comes not from the dullness of
sermons, but from the impossibility of getting a breath of good air in
many churches.
Please remember that exhaled air is excretory matter, and that it is
both unclean and unwholesome to consume it over and over again.
Draughts do not cause colds. Cold air does not cause colds. Wet clothes
do not cause colds: These things may be minor contributory factors, but
the body must be in poor condition before one can catch cold.
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