The screws are 5 feet 10 inches in diameter, and are each driven by two steam ... power of the engines in each boat is 140. They were set up in the works, and placed bodily on board the gunboats ...

The double propeller steam gunboat Metacomet was launched at Mr. SLACK's ship-yard in Williamsburgh, on Saturday. Two sister ships of hers, the Chicopee and Massasoit, were also put afloat during ...