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IS The many new features incorporated in the design of Vogt DT steam generators assure maximum steam generating economy with minimum: maintenance; These advanced design features tell why! Skin type inner casing eliminates the possibility of casing corrosion from combustion gases. Rectangular tube spacing for lower draft loss and higher efficiency. Fully wafer cooled rear wall for extra heating surface. Angled rear furnace wall obtains complete scrubbing of all rear, furnace tubes. No refractory wall maintenance. Tangent furnace tubes for higher heat absorption. HENRY VOGT MACHINE CO. P. 0. Box 1918, Louisville, Ky. 40201 SALES OFFICES: Camden, N.J., Charleston, W.Va., Chicago, Cleveland, Dallas, Los Angeles, New Orleans, New York, San Francisco, Seattle, St. Louis Circle 23 on Reader Service Card MECHANICAL ENGINEER1N