Mine and Smelter Corporation.

The Mine and Smelter Corporation, (originally founded as the Kennedy and Pierce Machinery Group in 1879), was a mining and machinery company located in Denver, Colorado. In 1958 Mine and Smelter Company purchased the Colorado Iron Works Company, (which was established in 1860). In 1971 Mine and Smelter Company changed its name to MSI Industries, and in 1975 to Mine and Smelter Corporation. Among the original owners of Mine and Smelter Supply Company were Eben Smith and brothers John and Robert Cary. By 1904, Joseph Seep had bought out the original partners, and he and his heirs retained control of the company for most of the twentieth century.

From the description of Mine and Smelter Corporation records, 1861-1977 (bulk 1900-1950) (University of Wyoming, American Heritage Center). WorldCat record id: 28082334

From the guide to the Mine and Smelter Corporation Records, 1861-1977 (bulk 1900-1950), (University of Wyoming. American Heritage Center.)