85

XIII. CLOTHING AND HOW TO USE IT 94

XIV. BREATHING 100

XV. FRESH AIR AND HEALTH 111

XVI. THE BLOOD AND HOW IT FLOWS THROUGH THE BODY 117

XVII. INSECTS AND HEALTH 127

XVIII. HOW THE BODY MOVES 135

XIX. THE MUSCLES AND HEALTH 144

XX. HOW THE BODY IS GOVERNED 149

XXI. HOW NARCOTICS AND STIMULANTS AFFECT THE
BRAIN AND NERVES 158

XXII. THE SENSES, OR DOORS OF KNOWLEDGE 165

XXIII. KEEPING AWAY SICKNESS 174

XXIV. HELPING BEFORE THE DOCTOR COMES 183

INDEX 189

HEALTH LESSONS

CHAPTER I

CARING FOR THE HEALTH

=Good Health better than Gold.=--Horses and houses, balls and dolls,
and much else that people think they want to make them happy can be
bought with money. The one thing which is worth more than all else
cannot be bought with even a houseful of gold. This thing is good
health. Over three million persons in our country are now sick, and
many of them are suffering much pain. Some of them would give all the
money they have to gain once more the good health which the poorest
may usually enjoy by right living day by day.

=How long shall you live?=--In this country most of the persons born
live to be over forty years of age, and some live more than one
hundred years. A hundred years ago most persons died before the age of
thirty-five years. In London three hundred years ago only about one
half of those born reached the age of twenty-five years. Scarcely one
half of the people in India to-day live beyond the age of twenty-five
years. In fact, people in India are dying nearly twice as fast as in
our own country. This is because they have not learned how to take
care of the body in India so well as we have.

[Illustration: FIG. 1.--By right living this woman remained in good
health for several years after she was a century old.]

The study which tells how to keep well is _Hygiene_. Whether you keep
well and live long, or suffer much from headaches, cold, and other
sickness, depends largely on how you care for your body.

=Working together fo