Tapping Electric Arc Steel Furnace, by Ralph D. Dunkleberger.


Three men at work in the interior of a fiery steel mill. One of the men reaches into the furnace with one of the long rods that are piled next to him, pulling out the melted metal into a mold.
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Tapping Electric Arc Steel Furnace, by Ralph D. Dunkleberger, Reading, Pa., 1936.