Abstract Photograph collections, 1910-1944, of Newton C. Marshall, a 1913 graduate of the Michigan College of Mines (now Michigan Technological University) in Houghton, Michigan. Includes mining and smelting images from Michigan's Copper Country and Iron Range as well as images from the Columbian mining operations of the South American Gold and Platinum Co. Also includes reels of film from the South American operations. Marshall was employed by the company from 1915 through his retirement in the...