Leading mining historian Kerby Jackson introduces us to a classic mining publication on Colorado Mining. First published in 1915, it has been unavailable since those days and sheds important light on the mines and mineral deposits of the Bonanza Mining District. Included are geologic details on the Rawley Mine, Antoro Mine, Cora, Michigan Mine, Gem City, Paragon, Great Mogul and dozens of other mines in this important mining region. Note: This edition is a perfect facsimile of the original edition and is not set in a modern typeface. As such, some type characters and images might suffer from slight imperfections or minor shadows in the page background.