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January, 1917 4500 H. P. De Laval Marine Reduction Gear DE LAVAL Geared Marine Steam Turbines The double-helical speed-reducing gear for steam turbine service was first intro- duced by De Laval in 1894. At present over 6500 De Laval Double- helical Speed-Reducing Gears are in successful operation. De Laval Gears are built by highly skilled workmen, from the best materials, and with equipment developed and improved by over 20 years of experience. All factors entering into the design have been chosen after long experience under practical operating condi- tions, and all parts are made on a limit gage, inter- changeable basis. The De Laval Double-helical Speed-reducing Gear is not an ingenious idea based upon imperfectly developed theories, but an accomplished fact. It is based upon the principle that a correctly cut gear, correctly mounted and protected from external dis- torting forces, will run smoothly and noiselessly and will not be subject to excessive wear or deterioration. If interested in saving weight and fuel, and in the greater simplicity and lower first ‘cost of geared turbines for ship propulsion, write us, giving particulars of the proposed boat so that we may supply full information. We are prepared to furnish marine steam turbines and gears in any capacity and for any steam conditions. DE LAVAL Steam Turbine Co. TRENTON, N. J. 219 THE MARINE REVIEW 15 WATERBURY CORDAGE EXT to actual experience with it in service, the best evidence of its superi- orityis the constantly increasing demand for our product. In buying Waterbury Cordage as well as other Waterbury Products, you are assured of as high a quality as it is pos- sible to make. We shall be pleased to send you a copy of our New Cordage Catalog WATERBURY COMPANY ‘63 PARK ROW, NEW YORK CHICAGO 8 oacie cicadas ev Meese Be ae roe 419 West 12th Place DALLAS, TEXAS, A. T. Powell & Co.,..911 Southwestern Life Bldg. SAN -FRANGISGCO SS.) ccoo Vance eheare cee: 45-55 Davis St. NEW ORLEANS, 1018 Maison Blanche Bldg.,..Canal and Dauphine Sts. Wire Rope, Fibreclad Wire Rope, Armored Wire Rope Please mention THE MARINE ReEvIEW when writing to Advertisers