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(ORIGINALLY PUBLISHED AS THE PRELIMINARY TREATISE TO THE

LIBRARY OF USEFUL KNOWLEDGE.)

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A NEW EDITION,
ILLUSTRATED WITH ENGRAVINGS,

BY SLY, WILSON, AND BYANS.

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5 556.2.5

HARVARD Culicut CTAKY

1875, March 22.
Valker Bequuet.

LONDON:

Printed by WILLIAM CLOWES,

Stamford-street.

ADVERTISEMENT.

The Committee of the Society for the Diffusion of Useful Knowledge have allowed Messrs. BALDWIN & Co. to publish this edition of the PRELIMINARY DISCOURSE, with Illustrations ; but it is their fixed determination to permit none but the ordinary and cheap edition of the other Treatises.

By Order of the Committee,

T. COATES, Sec.

Oct. 1, 1827.

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ADVANTAGES, AND PLEASURES

OF

SCIENCE.

INTRODUCTION.

In order fully to understand the advantages and the pleasures which are derived from an acquaintance with any Science, it is necessary to become acquainted with that Science; and it would therefore be impossible to convey a complete knowledge of the benefits conferred by a study of the various Sciences which have hitherto been cultivated by philosophers, without teaching all the branches of them. "But a very distinct idea may be given of those benefits, by explaining the nature and objects of the different Sciences: it may be shown, by examples, how much use and gratification there is in learning a part of

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