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

A loaded coal train and the gravity incline at 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 Klondike--prospectors a [sic] Claim 29, above Hunker

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

Abandoned or ruined railroad tracks at Hollywood Colliery.