Metallurgy is the art of extracting metals from their ores and bringing them into that state of purity which is necessary for their industrial application. Electro-metallurgy is that branch of the metallurgic art in which the agency of electricity is employed. We would then define electro-metallurgy as the art of extracting metals from their ores or of refining them, on a commercial scale, by the agency of the electric current.
By Joseph W. Richards, A. C, Ph. D., Instructor in Metallurgy, Mineralogy and Blow-piping, at Lehigh University, Bethlehem, Pa.: Member U. S. Naval Institute