Franklin shaft and engine house.

Huron mine, Houghton mine, Hancock and Houghton, Michigan.

General view of the Quincy copper mine from the Pewabic, Hancock, Michiagn.

Among the copper mines.

Among the copper mines.

Among the copper mines.

Among the copper mines, shaft house.

Inclines to the copper mines, Metcalf, Arizona.

Inclines to the copper mines, Metcalf, Arizona.