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OF

NATURAL PHILOSOPHY:

EMBRACING THE

GENERAL PRINCIPLES OF MECHANICS, HYDROSTATICS,
HYDRAULICS, PNEUMATICS, ACOUSTICS, OPTICS,

ELECTRICITY, GALVANISM, MAGNETISM,

AND ASTRONOMY.

ILLUSTRATED BY SEVERAL HUNDRED ENGRAVINGS.

DESIGNED FOR THE

USE OF SCHOOLS AND ACADEMIES.

BY LEONARD D. GALE, M. D.

Professor of Geology and Mineralogy in the University of the City of New York,
and Lecturer on Chymistry and Natural Philosophy.

NEW YORK:

COLLINS, KEESE & CO., 254 PEARL STREET,
W. E. DEAN, PRINTER, 2 ANN STREET.

KD 32343.

HARVARD
UNIVERSITY
LIBRARY

Entered according to the act of Congress, in the year 1837, by
THOMAS MELRATH,

In the Clerk's Office of the District Court of the Southern District of the State of

New York.

STEREOTYPED BY REDFIELD & LINDSAY,

No. 13 Chambers street, New York.

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