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VOL. II.-PNEUMATICS, ELECTRICITY, MAGNETISM,
AND OPTICS.

COMPILED FROM VARIOUS AUTHORITIES.

BY DENISON OLMSTED, A. M.

PROFESSOR OF NATURAL PHILOSOPHY AND ASTRONOMY.

THIRD EDITION.

Published and sold, wholesale and retail, by COLLINS, KEESE & Co., New York;
THOMAS, COWPERTHWAIT & Co., Philadelphia; S. BABCOCK, New Haven; and
for sale by the principal booksellers in the United States.

PRINTED BY B. L. HAMLEN-NEW HAVEN, CONN.

1838.