Collection, 1898, 1942-1975, of material related to the Arcadian Mine located in Ripley, Michigan.

Records, 1880-1902, of the Hodge Iron Foundry of Ripley, Michigan, also known as the Lake Superior Iron Works. Includes indexed accounts, general ledgers and payroll accounts.

Autobiography, circa 1984, of Marie McCurdy, a native of Ripley, Michigan. Includes description of her early life in Ripley and Hancock, her stay in the sanitorium with tuberculosis, as well as her time in Canada where her husband was a gold miner near Ontario. Also includes anecdotes upon returning to Michigan with accounts of her husband's illness from silicosis and her subsequent activities after his death.

Papers, 1911-1979, of the Mihelcic and Reagan families of Houghton County, Michigan.

Collection, 1899-1996, consists of financial and operational records, correspondence and photographs relating to the livery and floral businesses operated by the Nissila family of Ripley, Michigan. Also included are photographs and negatives unrelated to the business operations, including negatives taken during the family members’ services in WWII and the Vietnam War.

Ledger, 1903-1924, of the Portage Coal and Dock Company located in Ripley, Michigan. Includes financial records for expenditures, bills payable and bills receivable as well as records for the Hancock and Calumet retail branches, rents, dock repairs, hard and soft coal sales and some corporate accounts.

Records, 1886-1901, of the Portage Lake Foundry and Machinery Company as well as William S. and Letitia O. Cleaves, owners of the foundry. Includes bank drafts and correspondence. Also includes ink on linen plan of "Elevation of Improved Stamps Showing Iron Foundation, S.E. Cleaves and Son, Houghton, Michigan, 1886."

Letters, 1923-1924, series of correspondence between a Quincy Mining Company Smelter superintendent and a former worker, Charles Heikkinen, regarding the theft of copper and repayment. Heikkinen contacts the Quincy Mining Company Smelter 16 years after the theft in order to repay the value of 16 pounds of copper.

Photograph collection, 1911-1915, of Robert Wood, a 1906 Michigan College of Mines alumni. Images were taken during his employment at the Quincy Smelter in Ripley, Michigan and include photographs of the smelting machinery and process as well as the end product - copper ingots, ingot bars, wire bars and cakes. Also included are two scrapbook pages with photographs of the Copper Harbor Lighthouse and surrounding area.

Collection, 1881-2018, of the Seaman family, the majority created by Arthur Edmund Seaman and Wyllys Arthur Seaman. Includes correspondence to and from the Seamans, publications by the Seamans, poetry by A. E. Seaman, research notes on various topics and miscellaneous ephemera.