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ELEMENTARY LESSONS IN LOGIC.

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IN LOGIC:

DEDUCTIVE AND INDUCTIVE.

WITH COPIOUS QUESTIONS AND EXAMPLES,

AND

A VOCABULARY OF LOGICAL TERMS.

BY

W. STANLEY JEVONS, M.A.

PROFESSOR OF LOGIC IN OWENS COLLEGE, MANCHESTER.

London:

MACMILLAN AND CO.

1870.

[All Rights reserved.]

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PREFACE.

IN preparing these Lessons I have attempted to show that Logic, even in its traditional form, can be made a highly useful subject of study, and a powerful means of mental exercise. With this view I have avoided the use of superfluous technical terms, and have abstained from entering into questions of a purely speculative or metaphysical character. For the puerile illustrations too often found in works on Logic I have generally substituted examples drawn from the distinct objects and ideas treated in the natural and experimental sciences; and in this and other respects have aimed at rendering these Lessons a suitable companion to a series of science schoolbooks.

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