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30 THE MARINE. REVIEW October, 1920 Cold Drawn Steel Union 2 ermanent Efficiency When you put a Mark Union on one of your pipe lines, you have permanently removed all liability of waste or leakage. Cold drawn from steel—the brass seat welded in and all parts thoroughly rust proofed, it represents the acme of perfection in conserva- tion and economy. Write for sample today Mark Manufacturing Co. 1901 Dempster St., Evanston, III. General Offices: 2111 Conway Bldg. 111 W. Washington St., Chicago, Ill., U.S. A. District Sales Offices in all Principal Cities Contractors & MANUFACTURERS E ‘ ngineers S.S. Royal Aree Built by New York Ship Blde. Cone One of Over 140 Ships, Upon Which LIT-O-SIL-O DECKING IS LAID MADESCO WOOD MADESCO BITUMINOUS’ AND STEEL BLOCKS SOLUTION & ENAMEL Please mention Tue Marine Review when writing to Advertisers