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Ne TE EIT RM Set ee ey OE 40 THE MARINE REVIEW Your Vessel’s Safety A leak in your vessel’s pipe line is often as dangerous as a leak in her hull. Pipe line leaks easily develop where malleable or brass unions are used with wrought pipe, because of the unequal ex- pansion or contraction of the different mate- rials. Cold Drawn Steel Union \\ . ' You will always have perfect pipe line safety if you use Mark ye Unions. QThey are made from—wrought steel that has the {KY same coefficient cf expansion as the pipe on which it is ‘used. E pat @ Brass-to-steel ground ball joints prevent seat leaks in Mark 2 Unions. Let us send ycu samples and prices. MARK MANUFACTURING CO. 1901 Dempster St. EVANSTON, ILL. WERT Ee as ed Mme task a Be Designers of Comg lationfor Marine Work é Plans, $ | ° nd | ished hy i in a NTREAL >) Ghaseay oard of Trade Bldg. Oo d a : : 50 Wellington St. Please mention Tue Marine Review when writing to Advertisers