Broadcasting Telecasting (Oct-Dec 1957)

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<T3 Stainless Steel Porcupine. This ferocious-looking machine bristles with Stainless Steel spikes, and for a good reason, too. It's the main drive compressor for a supersonic wind tunnel at the National Advisory Committee for Aeronautics' Lewis Flight Propulsion Laboratory in Cleveland. It delivers a ton of air per second at a velocity of 1200 to 1800 miles per hour! The tunnel will test full-size turbojet and ramjet engines. It's Mowing Time Again. And a cleancutting all-steel rotary power mower like this can help you do the job faster and with less work. The all-steel deck is tough and unbreakable. The mower blade is steel, too, because steel is the only commercial metal that will take and hold a keen cutting edge. 41,000 Miles Of Wire. This picture was taken on the world-famous Mackinac Bridge, now under construction by American Bridge Division of United States Steel. The all-important main suspension cables contain 41,000 miles of %6-inch-diameter tough galvanized steel wire supplied by American Steel & Wire Division. The cables are laid four wires at a time by a traveling "spinning wheel." Each cable is over two feet in diameter and contains 12,580 wires. UNITED STATES STEEL uss AMERICAN BRIDGE . . AMERICAN STEEL & WIRE and CYCLONE FENCE . . COLUMBIA-GENEVA STEEL CONSOLIDATED WESTERN STEEL . . GERRARD STEEL STRAPPING . . NATIONAL TUBE . . OIL WELL SUPPLY TENNESSEE COAL & IRON . . UNITED STATES STEEL HOMES . . UNITED STATES STEEL PRODUCTS UNITED STATES STEEL SUPPLY . . Divisions of UNITED STATES STEEL CORPORATION, PITTSBURGH UNION SUPPLY COMPANY • UNITED STATES STEEL EXPORT COMPANY • UNIVERSAL ATLAS CEMENT COMPANY 7-1258 Watch the United States Steel Hour on TV every other Wednesday (10 p.m. Eastern time). Broadcasting November 11, 1957 • Page 75