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November, 1924 MARINE REVIEW 39 THE WHEELER Patented Oil Sludge Removal System No ship is too high—and no substance too heavy to be removed by theWHEELER SYSTEM, Furthermore, this system automatically removes all gas pockets and sickening com- bustion vapors, and is the greatest safe- guard against explosion and fires. Users of the WHEELER PATENTED SYSTEM say it effects a tremendous sav- ing in sludge removal costs over the old bucket and shovel method—and_ they know! Why rot investigate NOW? We now offer at outright sale franchise rights for any American port or group of ports. Foreign franchises also available. Barge equipped with the Wheeler Oil tank cleaning system operating in ‘Demonstrations at New York, Mobile and Galveston Harbor by J. J. Kane Boiler Works. Galveston. H. J. WHEELER SALVAGE CO., Inc., 224 Bush St., Brooklyn, N. Y. Telephones: Henry 1942-4387 Night—South 6399W SHERIFFS MANUFACTURING CO. PROPELLER WHEELS and PROPELLER . BLADES to fit any hub. MILWAUKEE, WIS. Almy Water Tube Boiler Co. Builders of Sectional Water Tube Boilers for all types.of vessels Providence, R.I. U.S. A. CATALOGUE FREE MANITOWOC Shipbuilding Corporation Ship, engine and boiler builders and dry dock proprietors. Two dry docks enabling us to dock ships up to 510! keel length. Excellent facilities for prompt and econom- ical repair work. MANITOWOC, WISCONSIN Please mention MARINE REVIEW when writing to Advertisers