OF THE

FRANKLIN INSTITUTE

OF THE

State of Pennsylvania;

DEVOTED TO THE

MECHANIO ARTS, MANUFACTURES, GENERAL SCIENCE

AND THE RECORDING OF

AMERICAN AND OTHER PATENTED INVENTIONS.

EDITED

BY THOMAS P. JONES, M. D.

PROFESSOR OF CHEMISTRY IN THE MEDICAL DEPARTMENT OF THE COLUMBIAN
COLLEGE, AND LATE PROFESSOR OF MECHANICS IN THE FRANKLIN INSTITUTE,
AND SUPERINTENDENT OF THE PATENT OFFICE AT WASHINGTON.

VOL. V.

NEW SERIES.

PHILADELPHIA:

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

MONROE & FRANCIS, BOSTON.

J. HARDING, PRINTER.

1830

T

•F834 j

JOURNAL

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.

JANUARY, 1830.

Experiments on the Friction and Abrasion of the Surfaces of Solids.

By GEORGE RENNIE, ESQ. F. R. S.

From the Transactions of the Royal Society.
Continued from page 396, Vol. IV.

THE apparatus referred to, page 388 of the last volume, for performing the experiments on the friction of attrition in solids, is shown in the subjoined cut, Fig. 1, in which a is the platform, b the fixed scale, and c the moving scale.