BOOK I.

THE FRONTIERS OF SCIENCE. GENERAL THEORIES OF LIFE AND DEATH. THEIR SUCCESSIVE TRANSFORMATIONS.

CHAP. PAGE

I. EARLY THEORIES 1

II. ANIMISM 5

III. VITALISM 15

IV. THE MONISTIC THEORY 34

V. THE EMANCIPATION OF SCIENTIFIC RESEARCH FROM THE YOKE OF PHILOSOPHICAL DOCTRINE 42