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Tune, 1923 MARINE REVIEW 31 Airco District Offices and Distributing Stations An Airco Distributing Station is located in each of the following cities. District Offices are located in cities indicated by a star (*). Albany, N. Y. *Los Angeles, Cal. Atlanta, Ga. 4th and Main Sts. Baltimore, Md. Bethlehem, Pa. *Birmingham, Ala. 2825 N. 29th Ave. *Boston, Mass. 122 Mt. Vernon St. Louisville, Ky. Madison, Ill. Milwaukee, Wis. * Minneapolis, Minn. 327-25th Ave., S. E. New Haven, Conn. Dorchester * New York, N. Y. Bridgeport, Conn. (Metropolitan District) Brooklyn, N. Y 342 Madison Ave. Bronx, N. Y. Jersey City, N. J. * Buffalo, N. Y. Brooklyn, N.Y. : Sr 4 SI the Blue Heart” shows The sign of long rope service 730 Grant St. Bronx, N.Y. Canton, O. AVIS | * Chicago, Ill. RATPARATIS 2236 So. Lumber St. AIRCO PRODUCTS Norfolk, Va. * Oklahoma City, Okla. P. O. Box 1338 Paterson, N. J. Peoria, Ill. * Philadelphia, Pa. Germantown and Allegheny Aves. *Pittsburgh, Pa. * Cleveland, O. 1210 W. 69th St. Cincinnati, O. Coatesville, Pa. Columbus, O. Defiance, O. Atmospheric Gas Products AIRCO-DAVIS- BOURNONVILLE PRODUCTS Welding and Cutting Apparatus and Supplies Acetylene Generators Specially Designed achines for Automatic Welding and Cutting NATIONAL CARBIDE *‘Airco Oxygen and Acetylene Service is Good Service’’ Des Moines, Ia. *Detroit, Mich. 7991 Hartwick St. Duluth, Minn. East Chicago, Ind. East St. Louis, Ill. * Emeryville, Calif. Park Ave. and Halleck St. Erie, Pa. Ft. Wayne, Ind. Gloucester, N. J. Grand Rapids, Mich. Hartford, Conn. Indianapolis, Ind. Jersey City, N. J. Johnstown, Pa.. Joplin, Mo. Kansas City, Mo. Lebanon, Pa. 1116 Ridge Ave. Portland, Ore. Pottstown, Pa. * Richmond, Va. P. O. Box 1192 Rochester, N. Y. San Francisco, Calif. * Seattle, Wash. 3623 E. Marginal Way Sharon, Pa. Springfield, O. St. Louis, Mo. 115 Plum St. Tacoma, Wash. Terre Haute, Ind. Toledo, O. Tulsa, Okla. Warren, O. West Quincy, Mass. Youngstown, O. ABD LSE Re ee BS BA RE TNE MBSE PM ESE A DM RSP ERE AOE he AIR REDUCTION SALES CoO. Mfr. of Airco and Airco-D-B products Controls the Manufacture and Sale of National Carbide Home Office: 342 Madison Ave., New York, N. Y. The GARY-CUMMINGS Torsion Meter Phantom view looking down on a typical turbine shaft section in which the Gary-Cummings Torsion Meter is installed. From the linear distance between the two lines shown on card in holder the Horse Power Transmitted . is Easily Calculated The merits and value of this device are demonstrated by the fact that it is used on S. S. Leviathan and very exten- sively by the U.S. Navy. Cummings Averaging Counters, for use where there are two or more shafts, give the engineer and navigator a con- venience and accuracy they cannot secure in other counters. Ask us why. Write for catalog fully describing the lines mentioned above, also our Combination Counter and Telltale. Cummings Machine Works 255 Atlantic Ave., BOSTON, MASS. On the sea, as on the land, the blue cotton thread marker—our Trade- mark—which runs between the strands of H. & A. “Blue Heart”’ Manila Rope has come to be familiarly recognized as a pledge of unfailing strength and long service. It is gratifying to know that thousands of rope users everywhere accept it as such. We spare no effort to justify this con- fidence. H. & A. “Blue Heart’? Manila Rope is spun from special quality pure manila fibre, carefully selected by our own experts. It is laid so that it is pliable and easy to work with, even in very large sizes. It is lubricated (not overloaded with oil and grease) and offers exceptional resistance to wear and weather. H. & A. “Blue Heart’? Manila Rope is guaranteed to equal in yardage and exceed in tensile strength the specifica- tions of the U. S. Government Bureau of Standards. We also make best marine oakum— our well-known “Mayflower” brand— and a full line of tarred fittings con- sisting of marline, ratline, houseline, hambroline, and spun yarn. The Hooven & Allison Company ‘Spinners of Fine Cordage since 1869’’ Xenia, Ohio 4 H®&A “Blue Heart” Manila Rope (C) 1923, The Hooven & Allison Co. Please mention MARINE REVIEW when writing to Advertisers