| | Abstract: | This collection is comprised of three bound volumes. The first volume, dated 1938 - 1952, describes the history, geology, mining methods and mine safety, complete with accompanying maps, photographs, and charts, of the Braden Unit of the Kennecott Copper Corporation. The second volume, dated 1943 - 1952, contains a set of blueprints of diamond drilling equipment. The third volume, which is undated, contains construction plans and calculations for various mining operations and buildings. | |
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