which you already have the pattern, every time you need one.

[Illustration: HIS OWN CUP AND TOWEL]

This sounds easy enough; and it is, too. But sometimes people don't
know when they have this "plague," and of course they do not feel that
they must be careful. What is to be done, then?

If people won't take care of themselves, then the government has to
make health laws to protect them, and the health officers have to see
that the laws are obeyed. In many of the states and cities, laws have
been made so that nobody is allowed to spit on the sidewalk or in the
cars or in any other public place; and common drinking-cups are
forbidden at all park fountains and at the water-coolers in schools
and trains and stations and other public places.

You ought to know about these things, because, as I have just said,
other sicknesses, too, are carried about in the nose and mouth.
_Grippe_, _pneumonia_ or lung fever, and what we call _colds_ are
caught in exactly the same way. We used to think we caught them by
being chilled; but we are much more likely to take them by being shut
up in a hot, stuffy room with other people who already have them.
Mother Nature never gave us such things in her beautiful, clean
outdoors. We must wear clothes enough to keep us warm when we go out,
and have bedclothes enough to keep us warm while we sleep; but we need
not be afraid of catching any sickness from the clean outside air,
either by day or by night. Drafts are not dangerous, except when our
blood is already full of poisons and germs from foul air.

Of course it is foolish even for strong, healthy people to run any