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FORMERLY PROFESSOR OF PHYSICS IN THE LYCÉE LOUIS-LE-GRAND,

INSPECTOR OF THE ACADEMY OF PARIS.

TRANSLATED AND EDITED, WITII EXTENSIVE MODIFICATIONS

By J. D. EVERETT, M. A., D. C. L., F. R. S., F. R. S. E.,
PROFESSOR OF NATURAL PHILOSOPHY IN THE QUEEN'S COLLEGE, BELFAST.

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NOTE PREFIXED TO FIRST EDITION.

The accurate method of treating electrical subjects which has been established
in this country by Sir Wm. Thomson and his coadjutors, has not yet been
adopted in France; and some of Faraday's electro-magnetic work appears to
be still very imperfectly appreciated by French writers. The Editor has
accordingly found it necessary to recast a considerable portion of the present
volume, besides introducing two new chapters and an Appendix. Potential
and lines of force are not so much as mentioned in the original.

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