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Records, 1948-1960, of the Lake Superior Radio Club, a group of amateur radio enthusiasts in Michigan's Upper Peninsula. Includes minutes of the club's meetings, copy of the by-laws and amendments, mailing list and correspondence as well as an amateur radio license.

Abstract Research material, 1726-1978, compiled by Charles K. Hyde on mining history. Includes photocopies and microfilm of articles, journals, and book chapters pertaining to United States copper mining with a particular focus on Lake Superior copper as well as material on the British iron and steel industry. Also includes index cards with citations and research notes pertaining to the Quincy Mining Company, other Michigan copper mining activities, general topics in U.S./international mining, and...

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Manuscript, 1890, by John Luther Harris while he was a student at the Massachusetts Institute of Technology. Handwritten copy of "On Copper Rocks and Copper Foundations of Lake Superior," Boston, Massachusetts.

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Papers, 1984-2002, of Ray Martin (Reino Marttinen) or Ontonagon, Michigan.

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Collection, 1853-1978, of the St. Mary's Canal Mineral Land Company of Boston, Massachusetts, a land holder with mineral rights on property along the Lake Superior copper region. Includes correspondence, financial records, land deeds and holdings, field journals and reports. Material in this collection complements material in the Copper Range Company Collection.

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Investigation Report and Photograph, 1989-1990, detailing the grounding of the United States Coast Guard Cutter Mesquite, which was grounded near Keweenaw Point in Lake Superior, December 4, 1989.

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Records, 1940-1978, of telephone lines for three United States Coast Guard stations in Lake Superior, Michigan: Huron Island, Eagle Harbor, and Portage Entry. Records include location diagrams of poles in relation to surrounding structures, span of cables, kind of material and date set. Also includes Bell System Practices manuals, by AT and T, for private branch exchange installation and maintenance.

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Records, circa 1970-circa 1990, of the Save Lake Superior Campaign, a campaign spearheaded by the late Verna Mize that worked to prevent the further degradation of Lake Superior and to promote its rehabilitation. Includes correspondence, reports, clippings, and photographs.