Chapter 15 - Progressive Montana, 1900-1924

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Online textbook: Chapter 15

 Ready to blast 1900 feet under the Butte Post Office, photo by N. A. Forsyth, Montana Historical Society Photo Archives Stereograph Coll.
Ready to blast 1900 feet under the Butte Post Office, photo by N. A. Forsyth, Montana Historical Society Photo Archives Stereograph Coll.