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September, 1926 MARINE REVIEW 35 Ihe Contra-Propeller HE Contra-Propeller consists of a set of guide blades or vanes so placed that they change the flow of water leaving the driving propeller from a tangential or spiral flow to a direct rearward stream line resulting in a consid- erable increase in effective propeller thrust and improves steering. From 10 to 20 per cent reduction in indicated horse power at the same speed has been realized in actual operation. This saving in horsepower has resulted in very material reduction in fuel consumption. The advantages of the Contra-Propeller, among which are decreased fuel consumption, increased speed, improved steering and maneuvering and less rolling and pitching are too great to be neglected. Let us send you full information about this device together with the results that can be expected on your vessels. The Contra-Propeller is manufactured in the United States solely by the Bethlehem Shipbuilding Corporation, Ltd., under license from Th. Goldschmidt Corpora- tion, 15 William St., New York City, exclusive representatives for the United States and Canada. Type of Contra-Propeller installed on Bylayl, Honancy and Freeman of Pocahontas Steamship Co. American vessels equipped with Contra-Propellers S.S. NORFOLK $.S. SUFFOLK Coastwise Transportation Co. $.S. STEEL NAVIGATOR S.S. FAIRFIELD CITY M.S. STEEL CHEMIST M.S. STEEL ELECTRICIAN Isthmian Steamship Lines S.S. DIRIGO S.S. HARVESTER The Texas Co. S.S. SANTORE S.S. FELTORE S.S. FIRMORE Ore Steamship Co. S.S. HONANCY ; S.S. FREEMAN Contra-Propeller installed on S.S. Florence Luckenbach S.S. BYLAYL Pocahontas Steamship Co. o&. neers BROWN BETHLEHEM SHIPBUILDING CORPORATION, LTD., idewater Oil Co. Ss. FLORENCE cathe ae BETHLEHEM, PA. Luckenbach Steamshi oO. S.S. CALISTOGA P General Sales Offices: s S. SIGH er ee 25 Broadway, New York City Tha Joa OD CREOLD. District Offices in Boston, Philadelphia, Wilmington, Baltimore, Standard Oil CH of N. J. Cleveland, Chicago, San Francisco ELISHA WALKER “==. | BETHLEHEM The Contra-Propeller Great Lakes Dredge & Dock Co. Please mention MARINE REVIEW when writing to Advertisers