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Publication History of the Gilman mining district(Colorado School of Mines. Arthur Lakes Library) Raines, Ed; Mines Museum of Earth Science; Colorado School of Mines. Arthur Lakes LibraryEd Raines, a geologist, mineralogist, and mining historian, talks about the history of the Gilman mining district. This lecture provides an overview of the mineralization in this area and includes information about zinc ores, zinc, and brass, as well as information about the New Jersey Zinc Company. Ed also explains the history and importance of metallurgical processes, such as froth flotation, and discusses some of the commercial uses of zinc and brass.Publication Geology of the Gilman mining district(Colorado School of Mines. Arthur Lakes Library) Raines, Ed; Mines Museum of Earth Science; Colorado School of Mines. Arthur Lakes LibraryEd Raines, a geologist, mineralogist, and mining historian, explains the geologic history of Gilman and goes on to describe the minerals found in the area.