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.

Anthracite Coal Strike Commission appointed 1902 by President Roosevelt

Section of burning mines.

Coal breaker.

Section of the burning mines.

Breaker at Hollywood Colliery.

Man in front of breaker at Hollywood Colliery.

Steam engine at Hollywood Colliery.

Men at Hollywood Colliery.

Abandoned or ruined railroad tracks at Hollywood Colliery.

Breaker at Hollywood Colliery.

Mine entrance at Hollywood Colliery.

The head of No. 7 plane.

Penn’a Coal Co’s machine shops at Dunmore.

View of Archibald and coal breaker, seen from bridge at foot of No. 26 plane.

Shenandoah, Pa.

Coal train waiting to be weighed.

Plain Buck Ridge Breaker.

Dirt heap at Lake Fuller Breaker.

Hickory Swamp Breaker.

Front of Buck Ridge Breaker.

Front of Buck Ridge.

Mining coal three miles under ground, Pennsylvania, U.S.A.

Mining coal three miles under ground, Pennsylvania, U.S.A.

Mining coal three miles under ground, Pennsylvania, U.S.A.

Mining coal three miles under ground, Pennsylvania, U.S.A.

Mining coal three miles under ground, Pennsylvania, U.S.A.

Miners going into the slope, Hazleton, Pa., U.S.A.