THE EARTH AND ITS LIFE

ITS LIFE

BY

A. WADDINGHAM SEERS B.A.

YONKERS-ON-HUDSON, NEW YORK
WORLD BOOK COMPANY

THE HOUSE OF APPLIED KNOWLEDGE

Established, 1905, by Caspar W. Hodgson
YONKERS-ON.

N-HUDSON, NEW YORK 2126 PRAIRIE AVENUE, CHICAGO

Copyright in Great Britain

All rights reserved

621499

C

X CONTENTS

CHAPTER

PAOK

.

33

42

52

65

.

75

I. THE EARTH AND THE UNIVERSE

II. How THE CRUST OF THE EARTH WAS

FORMED--THE PLAN OF THE EARTH

III. THE MOVEMENTS AND FASHIONING OF

THE CRUST.

IV. THE COMING OF LIFE

V. EVOLUTION

VI. THE EVOLUTION OF PLANTS

VII. PLANTS AND THEIR ENVIRONMENT

VIII. EVOLUTION OF ANIMAL LIFE-THE

LOWER FORMS

IX. BACKBONED ANIMALS : FISHES, AMPHI-

BIANS, REPTILES, AND BIRDS

X. MAMMALS

ΧΙ. ΜΑΝ

XII. THE EARLY USERS OF STONE

XIII. THE LATER USERS OF STONE

XIV. USERS OF STONE IN MODERN TIMES

XV. THE USERS OF BRONZE

XVI. THE IRON AGE

XVII. MAN DISCOVERS THE UNIVERSE

XVIII. MAN DISCOVERS THE EARTH

XIX. MAN AND HIS ENVIRONMENT

85

.

94

106

116

126

138

147

157