ant (p. 54).

Disease germs in the body also form poisons, just as some weeds in a
field form poisons. The poisons make us sick, just as if we had
swallowed the leaves of a poisonous weed.

=200. Fever.=--If a sickness is caused by disease germs, the body is
nearly always too warm. Then we say that the sick person has a
_fever_. Almost the only cause for a fever is disease germs growing in
the body. We can make a person have any kind of fever by planting a
few of the germs of the fever in the right part of his body.

We are made sick by the germs of fevers more often than by all other
causes put together. Here is a list of common diseases caused by fever
germs:--colds and sore throats, most stomach aches, blood poisoning in
wounds, boils and pimples, tuberculosis, whooping cough, measles,
chicken pox, diphtheria, scarlet fever, typhoid fever, smallpox, and
malaria.

Which of these kinds of sickness have you had? What sickness have you
had besides these?

=201. Sickness and Dirt.=--Disease germs leave the body of a sick person
in three ways: first, through the skin, second, through the kidneys and
intestines, and third, through the nose and throat. In these same ways
our body gives off its waste matters. If we did not take anything from
another person's body into our own body we should not catch fevers.

Whatever a feverish person soils may contain disease germs. When a
person has only a slight fever he often keeps at work, and then he may
scatter disease germs wherever he goes. So disease germs are likely to
be found wherever there is dirt or filth. Cleanliness means good
health as well as good looks.

=202. Disease germs in the skin.=--Disease germs may often be found in
sores and pimples on the skin, but they will not leave anybody's flesh
and blood through sound and healthy skin. If our skin is smooth and
fair, there will be few disease germs on it unless we rub against
something dirty. A dirty skin nearly always contains disease germs.
Washing and bathing our body will take disease germs from our skin and
help us to keep well.

=203. Disease germs in slops.=--A great many disease germs leave the
body through the intestine and kidneys, and may be found in the slops
and waste water of our houses. Slops are dangerous to health, for they
may run into a well, or spring, or river, and so carry disease germs
into our drinking water (p. 27). Also, house flies may light on the
pails or puddles and carry the germs t