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 OF SCIENCE, WASHINGTON, CORRESPONDING MEMBER OF THE NEW SERIES. VOL. XXV. PHILADELPHIA: PUBLISHED BY THE FRANKLIN INSTITUTE, AT THEIR HALL, & CO., NEW YORK; AND JOSEPH H. FRANCIS, BOSTON. 1840 |