A loaded coal train and the gravity incline at a coal mine, Pittsburg, Pa., U.S.A.

Boring for a blast in the depths of a coal mine, Pittsburg, Pa., U.S.A.

Miners pushing an "empty" (sides of tunnel show depth of coal vein), coal mine, Pittsburg, Pa., U.S.A.

The presidential party descending the 3,000 ft. shaft into the Congress Gold Mine, Phoenix, Arizona.

The strenuous life in the Klondyke [i.e., Klondike]

The Klondike--prospectors a [sic] Claim 29, above Hunker

Abandoned or ruined railroad tracks at Hollywood Colliery.