Chapter II

, though I am unaware as to how far Mr Broad would assent to any of my arguments as there stated.

It remains for me to thank the staff of the University Press, its compositors, its proof-readers, its clerks, and its managing officials, not only for the technical excellence of their work, but for the way they have co-operated so as to secure my convenience.

A. N. W.

IMPERIAL COLLEGE OF SCIENCE AND TECHNOLOGY. _April_, 1920.

CONTENTS

CHAP. PAGE

I NATURE AND THOUGHT 1

II THEORIES OF THE BIFURCATION OF NATURE 26

III TIME 49

IV THE METHOD OF EXTENSIVE ABSTRACTION 74

V SPACE AND MOTION 99

VI CONGRUENCE 120

VII OBJECTS 143

VIII SUMMARY 164

IX THE ULTIMATE PHYSICAL CONCEPTS 185

NOTE: ON THE GREEK CONCEPT OF A POINT 197

NOTE: ON SIGNIFICANCE AND INFINITE EVENTS 197

INDEX 199

THE CONCEPT OF NATURE

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