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OF THE

FRANKLIN INSTITUTE

OF THE

State of Pennsylvania

AND

MECHANICS' REGISTER.

DEVOTED TO

MECHANICAL AND PHYSICAL SCIENCE,

CIVIL ENGINEERING, THE ARTS AND MANUFACTURES,

AND THE RECORDING OF

AMERICAN AND OTHER PATENTED INVENTIONS.

EDITED

BY THOMAS P. JONES, M. D.

MEMBER OF THE AMERICAN PHILOSOPHICAL SOCIETY, OF THE ACADEMY OF NATURAL
SCIENCES, PHILADELPHIA, THE AMERICAN ACADEMY OF ARTS AND SCIENCES,
MASSACHUSETTS, THE NATIONAL INSTITUTION FOR THE PROMOTION

OF SCIENCE, WASHINGTON, CORRESPONDING MEMBER OF THE
POLYTECHNIC SOCIETY OF PARIS, AND OF THE CHILIAN
AGRICULTURAL SOCIETY, SANTIAGO.

NEW SERIES.

VOL. XXV.

PHILADELPHIA:

PUBLISHED BY THE FRANKLIN INSTITUTE, AT THEIR HALL,
F. TAYLOR, WASHINGTON CITY; G.' CARVILL

& CO., NEW YORK; AND JOSEPH H.

FRANCIS, BOSTON.

1840

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