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THE MARINE REVIEW Stop Every Blow-Off Leak by equipping your boilers with the combined HOVALCO Renewable Blow- Off Valves and HOMESTEAD Quarter-Turn Valves Let us send you full particulars. When closed they hold absolutely tight. The certain cure for any leaking blow-off. By closing the Home- stead, the Hovalco may be taken com- pletely apart for in- spection or repairs. Write. Homestead Valve Mfg. Company HOMESTEAD - PENNSYLVANIA FIRE TUBE MARINE SUPERHEATER 1. It is adaptable to either new or existing boilers of the fire tube type and can be applied with no change in design or construction. 2. It renders possible an increase in output of boiler horse power from a given boiler plant, 10% to 20%. 3. It will produce the same power output with fewer boilers. 4, It reduces the size of the bunkers, thereby reducing the draft of the vessel with a given cargo or making possible an increase in revenue cargo. EIGHT REASONS WHY 5. It results in a saving of fuel over saturated plants, both operating ‘under the same draft conditions, of 10% to 20%. 6. It reduces the maintenance costs by the prevention of water hammer, leaky flanges and con- densation in the cylinders. 7. It does not prevent rapid, thorough and frequent cleaning of the tubes. 8. Its construction provides easy access to all screwed joints and the easy removal ofthe parts. LOCOMOTIVE SUPERHEATER COMPANY 30 Church Street, NEW YORK, N. Y. Peoples Gas Bldg., CHICAGO, ILL. Have You Read the Classified Advertisements? Real bargains in Passenger and Freight Boats, Dredges, Tugs, Dredging Machinery, Engines, Boilers, Cranes, and other opportunities are awaiting you. Take a Look Now—You May Find Something Interesting 702 Please mention THE Marine Review when writing to Advertisers February, 1917