revents.

Particles of dead skin and disease-germs are left in the cup by each
drinker. Some of the most serious diseases may be carried in this way. A
cup made of heavy waterproof paper, cheap enough to be thrown away
after being used once, is a recent invention that is highly recommended
for use by school children and those who are obliged to drink away from
home. The water in a public drinking-fountain should come out in a small
steady stream so that those who have no cups may drink from the stream
itself as it rises. Many school-houses are so equipped.

Sleep is a necessary part of good hygiene. It promotes health and
prevents disease. It is largely in sleep that the system renews itself,
that growth takes place, that waste products are thrown off, and the
body repairs its wastes. No less than eight hours for grown persons and
ten for children should be employed in sleep. Late hours and sleepless
nights are the frequent cause of nervousness, eye strain, nervous
prostration, and the beginning of brain troubles and insanity.

Bathing is also necessary to good health. The pores of the skin play a
large part in carrying off the wastes of the body, through the
perspiration, and if these become clogged, this poisonous material
remains in the system. We have all noticed how a bath refreshes and
gives tone to the entire body by opening the pores.

The skin is composed of minute scales, arranged in layers like fish
scales. The tiny crevices between these form a lodging place for dirt
and germs. If these remain, our own bodies are constantly exposed to
their infection, if they drop off, as some are constantly doing, we may
spread the contagion to others. This is strikingly illustrated by
scarlet fever, smallpox, and similar diseases where these minute scales
are the sole source of contagion.

Exercise is another necessity of health. Regular physical culture in a
gymnasium will develop any muscle or part of the body almost at will,
but if this be not possible much can be accomplished in developing the
body by simple work. Gladstone found health in chopping wood, Roosevelt
in a daily tennis game, and President Taft in golf. Many find it in
gardening or farming. These all help to develop vigorous bodies.

Anything which brings into moderate play any set of muscles, which
increases the circulation, or stimulates the secretion is beneficial.
House-work, which, in its various forms, brings into use all the muscles
of the body