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arine kevie -urentoO fice Published Monthly Vol. 54, No. 5 MAY, 1924 > Pere Marquette Car Ferry No. 19 FUEL CONSUMPTION REDUCED 13.8% BY USING SUPERHEATED STEAM Built in 1903, she is equipped with twin-screw reciprocating triple expansion engines, and has four single-ended Scotch boilers, operated under natural draft. High degree Elesco Fire Tube Superheaters were installed in the boilers in 1923, capable of giving 200° superheat to the steam at 175-lb boiler pressure. greater part of the year on three boilers at an average speed of 12 miles per hour. the superheaters were installed, tests were made under conditions similar to those under which the boat operated when using saturated steam, showing a fuel saving of 13.8%. This boat operates for the After Over 3,000 ships, flying all flags, are equipped with Elesco type Superheaters. THE SUPERHEATER COMPANY 17 East 42nd Street, Peoples Gas Building NEW YORK CHICAGO Todd Shipyards Corporation licensed by the Superheater Company under Schmidt and other patents. Canada: The Superheater Company, Limited, Montreal USLHLAL 2 $3.00 a Year 35c a Copy ~ e 4 vx Hes io te tikom Frown (ME BF 106 IND