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For the New AGWI Liners ABCOCK & WILCOX Water-Tube Boilers, Super- heaters, Oil Burners and No. 80 Fire Brick, for the new steamers of the Atlantic, Gulf & West Indies Steam- ship Lines, to operate at 300 pounds pressure and 200 degrees superheat, indicate not only the marked advance in recent years towards higher efficiency and economy in the operation of steam-driven vessels, but are the latest and best practice in the field of Naval Architecture and Marine Engineering. THE BABCOCK & WILCOX CoO. Manufacturers of Marine Water-Tube Boilers Since 1895 SAN FRANCISCO NEW YORK CLEVELAND THE RITCHIE LIQUID COMPASS The Standard Liquid Compass the world over. Used Exclusively in U. S. Navy. for over 40 years. Over 65,000 on Merchant Vessels in all parts of the world. Made in all sizes 2 to 12"! dia. Magnets for adjusting Purposes. Star Brass Mfg. Co. 53 Oliver Street -::- Boston, Mass. MANUFACTURERS OF Accurate ‘‘Non-corrosive’’ Pressure and Recording Gages, Revolution Counters, Marine Clocks. Dead Weight Gage Testers. Marine Safety and Relief Valves for all pressures. Marine Whistles and Sirens. Extra Heavy Renewable Globe, Angle and Check Valves. Star Outside Spring Steam Engine Indicators. HIGH GRADE THROUGHOUT SPECIFY AND ORDER THE BEST. Branches: CHICAGO PITTSBURGH NEW YORK Standard Binnacle E. S. RITCHIE & SONS Brookline, Mass., U.S.A. Agents for the Great Lakes, The Upson-Walton Company, Cleveland, Ohio GET YOUR COPY Our New Diesel Engine Folder Is Ready. It Describes the Best Engine for Driving Auxiliaries, Generators, Pumps, etc. The reason for experienced engineers Selecting Standard Engines is Written In Our Specifications. Get Them. STANDARD MOTOR CON. CO. Jersey City, N. J Please send New Diesel Folder. STANDARD MOTOR CONSTRUCTION CO. 184 Whiton St. Jersey City, N. J. MARINE REVIEW—July, 1929 89