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Port shaft of a Lucken- ach Line steamship protected with a “U.S.”’ A rubber-covered shaft will not corrode ... Corrosion, erosion, electrolysis, and pitting are taking years of service out of your pro- peller shafts. Marine experts have realized for years the unusual possibilities of rubber, with its natural waterproofing qualities, as a shaft protection. It remained, however, for the United States Rubber Company to develop a satisfactory compound for shaft sleeves— and a satisfactory method of permanent application. Today, “U. S.”’ Protective Sleeves are proved insurance against shaft deterioration. They have been approved by the American Bureau of Shipping and Lloyds, and adopted as standard equipment on many large steam- ship lines and U. S. Navy vessels. Easily and quickly applied—at an_ initial and ultimate cost low in comparison to other methods of shaft protection. Write for our descriptive booklet—‘“‘Protective Rubber Covering for Propeller Shafts.” United States Rubber Company Marine Sales & mr) Department 1780 Broadway New York City Trade Mark METAL BANDS COMPOSITION SLEEVE PROTECTIVE LAYERS OF RUBBER Illustrating exclusive method of application and binding of “U.S.” Rubber Sleeve protection. (PAT. APPLIED FOR) Note the protective layers of rubber and the metal bands which insure permanent bond of sleeve to the shaft. “U.S.” PROTECTIVE RUBBER SLEEVES for marine propeller shafts MARINE REVIEW—April, 1927 55