Specifications for Two Horizontal Direct-acting Compound Screw Engines for U.S.S. Charleston, of 3,730 Tons Displacement, the Engines, with Their Auxiliaries of 7,500 I.H.P. Under Forced Draught: Including Boilers, Screw Propellers and All Appendages and Appurtenances Complete, Together with a List of Tools, Instruments, and Duplicate Pieces to be Furnished