Chapter XV: 544-584

River and coast trade of Great Britain—The _Iona_, paddle steamer—First screw collier _Q. E. D._—The _King Coal_ collier—Her dimensions and crew, _note_—Improvement in care of seamen—Leith and London traders—Dublin and Holyhead Mail-Packets—Their great speed and regularity—Dimensions, power, capacity, and cost—Dover and Calais Mail-Packets—The _Victoria_—Her speed—Proposed tunnel and other modes of crossing the Straits of Dover—Mr. Fowler’s plan—The _Castalia_—The _Bessemer_—Her swinging saloon—The cigar-ship built at Baltimore, 1858—Similar ship built on the Thames, 1864—Perkins’s economical steam-engine and proposed fast boat—The Engine of the _Comet_—Modifications in the construction of Marine Engines—Ratio of speed to power—The Compound Engine more economical than the simple—Great skill required for building perfect ships, and especial importance to England of having the best ships—But her ships not yet perfect, though great progress has been made during the last half century

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