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April, 1923 . MARINE REVIEW | 39 Walker’s Patent “Trident” Electric Ship-Log Can be run off the Ship’s Circuit or Batteries Log Register on the taffrail, is also recorded in the Chart House or in any other part of the vessel as desired This enables the Officer of the Watch to take the Log reading himself. \ Sass ‘ _\ By the use of this instrument, the distance run, as indicated by the \ \ Write for full particul Taffrail Register for full particulars To be obtained through leading Marine Opticians and Ship-Chandlers in the United States and Canada THOS. WALKER & SON, LTD. siiiX3i8i"tko. “i cae AM e ‘*Reading the Log’”’— in the Chart House Go to Tiebout First “We've looked all over for these things--- A Record Performance— using Highly Superheated Steam 1.67 lbs. Oil per 100 D. W. Ton Miles S S “MARORE” MANY new customers are astonished at and here you have them right in stock.” BETHLEHEM SHIPBUILDING CORPORATION, Builders It is an old story with our clientele of years’ D. W. T. 20,700 standing. Simply the result of years spent in Average speed - 10.5 knots : ; Average fuel per 24 hours - 262bbls. studying the needs of the trade. Steam pressure 220 lbs. SUPERHEAT 200° ELESCO High Degree Fire Tube SUPERHEATERS Marine, Cabinet and Refrigerator Hardware THE SUPERHEATER COMPANY General Offices: 17 East 42nd St., New York ea W. & J. TIEBOUT For Canada: The Superheater Company, Ltd., Montreal 118 Chambers Street New York City Established 1853 Incorporated 1892 The GARY-CUMMINGS Torsion Meter is used very extensively for determining the power of marine turbines. It records on paper the angular twist of the revolving shaft. The rec- ord consists of two parallel lines, and from the distance between them the horsepower can be readily calculated. USED EXTENSIVELY BY THE U. S. NAVY and by other ships such as the “Leviathan.” . ie Each Cummings Instrument is designed to meet the requirements of the particular ship on which it is to be installed —a fact that insures accurate and dependable service—always. a May we send Catalog Covering Torsion Meters, Averaging Counters and Combination Counter and Telltale? CUMMINGS MACHINE WORKS, Boson, MaSs: Please mention MARINE RevIEW when writing to Advertisers