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INQUIRIES

OONCERNING TAR

INTELLECTUAL POWERS,

AND THE

INVESTIGATION OF TRUTH.

BY JOHN ABERCROMBIE, M.D.F.R.S.,
Fulɔw of the Royal College of Physicians in Edinburgh, &c., and Fint. Physician

to His Majesty in Scotland.

FROM THE SECOND EDINBURGH EDITION

NEW-YORK:

NEW-YORK:

PRINTED AND PUBLISHED BY J. & J. HARPER,

NO. 82 CLIFF-STREET,
AND FOR SALE BY THE PRINCIPAL BOOKSELLERS THROUGHOUT

THE UNITED STATES.

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PREFACE

TO THE SECOND EDITION

The Author deeply feels the favourable manner in which this volume has been received by the public, and the notice which has been bestowed upon it by those whose approbation is high praise. In preparing a new edition, he has made various verbal corrections, and has added a considerable number of new facts and observations, which, he trusts, may increase the interest of the work. Some of these additions will be found under the following subjects :—The question of the immateriality of the thinking principle ;-false perceptions ;-the credibility of testimony ;-memory ;conception ;—and the influence of disease upon attention and memory. There are also various new facts on dreaming and spectral illusions ; and under the section “On the qualities and acquirements which constitute a well-regulated mind,” there have been added remarks on observing and inventive genius.

EDINBURGH, 1831.

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CONTENTS.

INTRODUCTION

Pago 15

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PRELIMINARY OBSERVATIONS ON THE GENERAL OBJECTS

OF SCIENCE. Uniformity of the Relations of Bodies

19 Origin of our Idea of Causation

20 Our Idea of the Relation of Cause and Effect in refer.

ence to any two events, entirely distinct from our intuitive impression of Causation

21 Of Physical, Èfficient, and Final Causes

23 The Object of Science is to trace the Uniform Rela- . tions of things

24 The Object of Art is tɔ apply our Knowledge of these Relations for producing particular Results

24 Distinction of Sciences and Arts, according to the par

ticular Substances or Relations which are their im

mediate objects Division of Sciences into certain and uncertain ::

27 Grounds of Uncertainty in a Science

28 Illustrations of the Uncertain Sciences from Medicine and Political Economy

30 Imperfection of all Science, from the limited nature of the human faculties

31

25

PART I.

OF THE NATURE AND EXTENT OF OUR

KNOWLEDGE OF MIND. Our Knowledge of Mind limited entirely to Facts 33 Ideal Theory of the Old Philosophy

34

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