physiological demonstrations are indispensable.
Subjects for demonstrations are not given, because they cannot be
performed by the children; but the teacher should make free use of the
series given in the author's advanced physiology.

Cuts and diagrams are inserted where they are needed to explain the
text. They are taken from the author's _Applied Physiology,
Intermediate Grade_. Each was chosen, not for artistic effect, but
because of its fitness to illustrate a point. Most of the cuts are
adapted for reproduction on the blackboard.

The effects of alcohol and other narcotics are treated with special
fulness. The subject is given a fair and judicial discussion, and
those conclusions are presented which are universally accepted by the
medical profession. But while this most important form of intemperance
is singled out, it should be remembered that the breaking of any of
nature's laws is also a form of intemperance, and that the whole study
of applied physiology is to encourage a more healthy and a more noble
and self-denying mode of life.

CONTENTS

CHAPTER PAGE

I. CELLS 7

II. OF WHAT CELLS ARE MADE 10

III. DIGESTION OF FOOD IN THE MOUTH 13

IV. DIGESTION OF FOOD IN THE STOMACH 17

V. FOODS 23

VI. TOBACCO 31

VII. FERMENTATION 37

VIII. KINDS OF STRONG DRINK 42

IX. THE BLOOD 49

X. BREATHING, HEAT, AND CLOTHING 59

XI. THE SKIN AND KIDNEYS 75

XII. THE NERVES, SPINAL CORD, AND BRAIN 84

XIII. THE SENSES 100

XIV. BONES AND JOINTS 109

XV. MUSCLES 115

XVI. DISEASE GERMS 123

XVII. PREVENTING SICKNESS 132

INDEX 139

APPLIED PHYSIOLOGY

CHAPTER I

CELLS

Our body is made of many parts. Its head thinks. Its legs carry it,
and its arms and hands take hold of things. The leg cannot do the work
of the arm, nor the head do the work of the hand; but each part does
only its own work.

=1. The simplest animal.=--