OF THE

FRANKLIN INSTITUTE

OF THE

State of Pennsylvania;

DEVOTED TO THE

MECHANIC ARTS, MANUFACTURES, GENERAL SCIENCE,

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 NA-
TURAL SCIENCES, PHILADELPHIA, AND CORRESPONDING MEMBER

OF THE POLYTECHNIC SOCIETY OF PARIS.

VOL. XIII.

NEW SERIES.

PHILADELPHIA:

PUBLISHED BY THE FRANKLIN INSTITUTE, AT THEIR HALL;
THOMPSON & HOMANS, WASHINGTON CITY; G. & C. & H. CARVILL, NEW YORK;

AND MONROE & FRANCIS, BOSTON.

J. HARDING, PRINTER.