THE
WONDERS OF LIFE
A POPULAR STUDY
OF BIOLOGICAL PHILOSOPHY
BY
ERNST HAECKEL
(Ph.D., M.D., LL.D., Sc.D., and Professor at the
University of Jena)
AUTHOR OF
"THE RIDDLE OP THE UNIVERSE"
"THE HISTORY OF CREATION"
"THE EVOLUTION OF MAN"
ETC.
TRANSLATED BY
JOSEPH McCABE
SUPPLEMENTARY VOLUME TO
"THE RIDDLE OF THE UNIVERSE"
[Illustration: LOGO]
HARPER & BROTHERS PUBLISHERS
NEW YORK AND LONDON
1905
Copyright, 1904, by HARPER & BROTHERS.
_All rights reserved._
Published January, 1905.
CONTENTS
PART I.--METHODOLOGICAL SECTION:
KNOWLEDGE OF LIFE
PAGE
PREFACE v
CHAPTER I
TRUTH 1