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April, 1919 THE MARINE REVIEW 47 America, Mistress of the Seas? A real, worth-while American merchant marine! A fleet of ships under the American flag plying the waters of the world. Restoration of the proud title of mistress of the sea when the Yankee clipper was known in every port. A return, with a 25 percent improvement, of the days before the Civil War when 80 percent of our foreign commerce was carried in American bottoms. —The Marine Review, February, 1919. While previous to 1915 the construction of ships and transportation by water in the United States have not been commensurate with the advancement in railroad con- struction and other lines of industry, including the manufacture of steel, the growth of the American merchant marine for the last sixty years has been aided and abetted at all times by Carnegie Steel Company and its lineal predecessors which have rolled Ship Plates, Armor Plate, Ship Channels, Bulb Angles, Angles and other Structural Shapes as and when required by shipbuilders. 3 Carnegie Steel Company manufactures a larger variety of shipbuilding materials than any other steel maker in its line in the United States and Carnegie Service goes to the user with them all. It has prepared several pamphlets which should be in-the hands of those engaged in the building of ships:— Structural Steel for Ships, Second Edition, contains the Standard Practice recom- mended by American steel makers and adopted by the Emergency Fleet Corporation as revised November 20, 1918, together with a commentary containing an elementary but detailed discussion of rolling mill practice and steel works procedure as it is related to the manufacture and shipment of ship steel and reflected in the American Standard Practice. By observance of the regulations laid down in this book, shipbuilders can very materially assist steel makers in the manufacture and ship- ment of ship steel and thereby insure the speediest and most economical construction of vessels. Ship Channels and Bulb Sections, Fifth Edition, contains the new list of American Standards of Shipbuilding Channels and Bulb Angles adopted November 19, 1918, and profiles, di- mensions, weights of sections and properties necessary for use by ship designers. The Liberty Mill describes the construction of the 110 inch Liberty Plate Mill as an emergency a measure to roll ship plates, by Homestead Steel Works, Carnegie Steel Company, in six months, an engineering achievement which justly deserves mention even at a time of rapid building construction. Carnegie Steel Company 464 Frick Building Annex, Pittsburgh, Pa. 1216 Please mention THE Marine Review when writing to Advertisers