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February, 1922 MARINE REVIEW 43 LIDGERWOOD Philadelphia, Pittsburgh, Illustration shows our Vertical Marine ype CO2 Compressor, for connecting direct to steam engine. A very compact unit for marine service. Chicago, TOWING Principle With the old towing methods the excessive strains caused by jerking of the hawser fall on the hawser or the engine. Jerking Strains STEAM AND ELECTRIC SHIP WINCHES Send for Catalog of Marine Machinery LIDGERWOOD MFG. CO., 96 Liberty St., New York BRANCHES Cleveland, Detroit, Los Angeles, Seattle, Refrigeration This open -type compressor is a favorite with Marine Engineers. Knowing their likes and dislikes by personal contact, Fred Wittenmeier designed this machine; it has proved a remarkable success. The Carbonic Anhydride (CO2) System has many advantages over Ammonia or other systems using dangerous gases as refrigerating mediums. CQO2 is safe and non-explosive, and a possible mistake on the part of the operator or a break in pipe cannot result in loss of life and property which is of common occurrence with other systems. Wittenmeier Machinery Co. Refrigerating Apparatus CHICAGO, U. S. A. Please mention Martne Review when writing to Advertisers ENGINES A New Towing We Eliminate All London, Eng.