1942. "White-hot steel pours like water from a 35-ton electric furnace at Allegheny Ludlum Steel Corp., Brackenridge, Pa. The finest quality steels and alloys are produced in these furnaces, which allow much greater control of temperature than other conversion furnaces. The proportion of electric furnace steel is rising steadily, even though this process is the most expensive. The furnace is tilted for the pouring; the flying sparks indicate the fluidity of the steel." 4x5 Kodachrome transparency by Alfred Palmer for the Office of War Information.
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