Volume III. University Control. By J. MCKEEN CATTELL and other

authors.

AMERICAN MEN OF SCIENCE. A Biographical Directory.

SCIENCE. A weekly journal devoted to the advancement of science. The official organ of the American Association for the Advancement of Science.

THE POPULAR SCIENCE MONTHLY. A monthly magazine devoted to the diffusion of science.

THE AMERICAN NATURALIST. A monthly journal devoted to the biological sciences, with special reference to the factors of evolution.

THE SCIENCE PRESS

NEW YORK GARRISON, N. Y.

THE FOUNDATIONS OF SCIENCE

SCIENCE AND HYPOTHESIS THE VALUE OF SCIENCE SCIENCE AND METHOD

BY H. POINCARÉ

AUTHORIZED TRANSLATION BY GEORGE BRUCE HALSTED

WITH A SPECIAL PREFACE BY POINCARÉ, AND AN INTRODUCTION BY JOSIAH ROYCE, HARVARD UNIVERSITY

THE SCIENCE PRESS NEW YORK AND GARRISON, N. Y. 1913

Copyright, 1913 BY THE SCIENCE PRESS

PRESS OF THE NEW ERA PRINTING COMPANY LANCASTER, PA.

CONTENTS

PAGE Henri Poincaré ix Author's Preface to the Translation 3

SCIENCE AND HYPOTHESIS

Introduction by Royce 9 Introduction 27