The data book, 1916-1917, containing smelting data of the Copper Range Mining Company. Also included is transcription and analysis (12 pages) of the data book completed by Karl Rundman.

Lists, 1915-1921, of stockholders in corporations operating in Houghton County, Michigan. Lists include personal information such as names and addresses of the stockholders as well as how many shares of common and preferred stock they own.

Blueprints, circa 1898-circa 1913, collected by Theodore Dengler, an alumnus of the Michigan Mining School in Houghton, Michigan. Dengler worked at the Atlantic, Baltic, Mohawk and Wolverine mines. Includes blueprints of machinery, buildings, and maps, mainly from the Atlantic and Baltic mines with some from the Mohawk, Wolverine, Allouez, Champion and Central mines. Also includes correspondence and other printed ephemera.