...serious doubts as to the advantage to be derived from them. The first two, with bulwarks, named respectively the Galena and Ironsides, played but an insignificant part during the war; the third was Mr. Ericsson 's. The Swedish engineer engaged to construct, in less than four months, and at a cost of two hundred and seventy-five thousand dollars, a vessel of nine hundred tons, forty metres in length, eleven i...