OF Τ THE FRANKLIN INSTITUTE OF THE State of Pennsylvania AND AMERICAN REPERTORY OF MECHANICAL AND PHYSICAL SCIENCE, CIVIL ENGINEERING, THE ARTS AND MANUFACTURES, IND OF AMERICAN AND OTHER PATENTED INVENTIONS. EDITED the Nat. Inst. for Promotion of Sci., Washington, &c. &c. &c. AND JAMES J. MAPES, A. M., of the Roy. Soc. of St. Petersburg, &c. &c. &e. COLLABORATORS. SEARS C. WALKER. FREDERICK FRALEY. THOMPSON S. BROWN, C. E. WILLIAM H. EMORY, U.S. Top. Eng. ELLWOOD MORRIS, C. E. For Mining and Metallurgy. THIRD SERIES. Vol. V. PHILADELPHIA. 1843 |