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Engineering Specialties REFLEX WATER GAGES Used on all types of boilers by all the Principal Navies of the World “THE WATERSHOWSBLACK” ADVANTAGES Quick and reliable observation of the water level. Safe, sure and durable at high pressures. Not af- fected by cold air drafts. Most effective protection against injuries to boilers and workmen. Easily ap- plied to all types of gage glass fittings. When filled with WATER the Reflex Gage always appears BLACK. When empty it instantly shows WHITE. No mistake pos- sible. This feature alone is worth many times the cost of the Reflex. Send for catalog of Water Gage Apparatus. MANUFACTURED BY THE JERGUSON GAGE!& VALVE CO. WINTER HILL, SOMERVILLE, MASS. ELLIS HULLS ARE STRONG Endorsed by New York Central Line Merritt-Chapman & Scott Corporation Raymond Concrete Pile Company Red D Line New York & Hastings Steamboat Co. (Anaconda Copper Mining Co.) 41 Hulls, including a wrecking barge carrying the world’s largest float- ing derrick, built and under con- struction for varied types of serv- ice at home and abroad. Write for further information. ELLIS CHANNEL SYSTEM OF STEEL HULL CONSTRUCTION Edgar Ames, Sole Licensee 30 Church St., New York Patented GREATER EFFICIENCY AND LONGER SERVICE at no additional cost HE LAST WORD in rope efficiency is WATERFLEX. Its water-resisting qualities have been proven in the most difficult kinds of service, with expressed satisfaction. Dampness, rain or immersion in water have practically no effect upon WATERFLEX, which remains permanently lubricated and flexible at all times. WATERFLEX does not swell, harden or kink when water-soaked. Its ease of handling and splicing, wet or dry, will amaze you. WATERFLEX CORDAGE is manufactured under exclusive Whitlock patents and supervision, and offers you many outstanding advantages at no extra cost. The following photographs of a soaking test tell their own story— ORDINARY ROPE ry A WATERFLEX Si bout 20 minutes ORDINARY ROPE (Note swelling and shortening) Why not try out a coil of WATERFLEX and judge it for yourself? WHITLOCK CORDAGE COMPANY 46 South Street, New York Branches Chicago, Boston, Kansas City and Houston Factory and Warehouses Jersey City, N. J. MARINE REVIEW—November, 1927 89