General view of the Great Union Stock Yards, Chicago, U.S.A.

The stock yards and packing houses of Chicago - one of the world's greatest industries.

Cutting up the hogs, Armour's great packing house, Chicago, U.S.A.

A half-mile of pork, Armour's great packing house, Chicago, Ill.

A half-mile of pork, Armour's great packing house, Chicago, Ill.

A half-mile of pork, Armour's great packing house, Chicago, Ill.

A half-mile of pork, Armour's great packing house, Chicago, Ill.

A half-mile of pork, Armour's great packing house, Chicago, Ill.

A half-mile of pork, Armour's great packing house, Chicago, Ill.

General view of the Great Union Stock Yards, looking north-west of the packing house, Chicago, Ill., U.S.A.

Cattle in the Great Union Stock Yards, the greatest of the live stock markets, Chicago, Ill.

Cattle in the Great Union Stock Yards, the greatest of the live stock markets, Chicago, Ill.

Cattle in the Great Union Stock Yards, the greatest of the live stock markets, Chicago, Ill.

Cattle in the Great Union Stock Yards, the greatest of the live stock markets, Chicago, Ill.

Cattle in the Great Union Stock Yards, the greatest of the live stock markets, Chicago, Ill.

The last process in dressing beef: washing with boiling water. Chicago, Ill., U.S.A.

From the Kansas Plains. Union Stock Yards [stockyards], Chicago, Ill., U.S.A.

Union Stock Yards [stockyards], Chicago, Ill., U.S.A.

Union Stock Yards [stockyards], Texas cattle, Chicago, Ill., U.S.A.

Hanging room, Armour's packing house, Chicago, Ill.

Birdseye view of the Union Stock Yards [stockyards], Chicago, Ill., U.S.A.

Birdseye view of the Union Stock Yards [stockyards], Chicago, Ill., U.S.A.

Birdseye view of the Union Stock Yards [stockyards], Chicago, Ill., U.S.A.

A busy morning in the Great Union Stock Yards [stockyards], Chicago, Ill.

In the Great Union Stock Yards [stockyards], Chicago, U.S.A.

In the Great Union Stock Yards [stockyards], Chicago, U.S.A.

In the Great Union Stock Yards [stockyards], Chicago, U.S.A.

In the Great Union Stock Yards [stockyards], Chicago, U.S.A.

Chicago: the Union Stock Yards [stockyards]. A wild lot from Texas, U.S.A.

Stock Yards [stockyards].