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.