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June, 1925 N their application to each ‘phase of Power Plant lubri- cation, the lubricants compris- ingtheTideWaterPowerGroup form the “film of protection,” thin as tissue, smooth as silk, tough as steel. The application ofthe Tide Water Power Group to your machinery will give you truly economical lubrication— maximum power, uninterrupt- ed operation and increased production. The “film of protection” —for marine engine lubrication F YOU could watch your en- gine oil in action, you would see that it forms a thin film over all the vital parts of the engine. This film works its way between all the whirling flying surfaces and prevents destructive metal to metal contact. As long as the oil film remains unbroken, your engine is protected. | Weavol Marine E gine Oils In action, Wavol Marine En- gine oils form the “film of protec- tion’ that safeguards every fric- tion: surface of your engine. The “film of protection” stands steadfast in the face of constant attacks of heat and friction. Wavol Marine Engine oils were GRENOL Pure Pennsylvania Cylinder Oils for all steam conditions, from wet steam to superheat. Please mention MARINE REVIEW when writing to Advertisers DYNOL Engine and Turbine Oils for engine bearings, turbines, gen- erators and air compressors, MARINE REVIEW perfected, after years of research and practical experience, by the technologists of the Tide Water Engineering Bureau. These oils have passed the most severe ser- vice tests—in hundreds of ships. They adhere tenaciously to the fast-moving parts of your engines. They do not wash off—because they are heavily compounded and emulsify readily. Have one of our Staff Engi- neers call to discuss marine lubri- cation with you. Let him show you how the “film of protection” and the Tide Water Power Group can increase horse-power effici- ency and effect greater operating economies in your engine room. TipE WarTER O1L SaLEs CoRPORATION ELEVEN BROADWAY NEW YORK oW. e ah, — Tide Water *=* Power Gro WAVOL ting and Diesel engines. Brands of engine oils for all bearing surfaces on reciproca- TYCOL Bearing Greases for bearings, high and low speed gearing and industrial machinery.