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library of congress

pennsylvania

1940 s

19th century

3 d glasses

40 s

allegheny county

allegheny ludlum

allegheny ludlum steel mill

trip hammer

public
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A poster comes to life. Sergeant Vineyard knows a lot about howitzers and anti-aircraft guns but he'd never seen a machine like this giant trip-hammer until he visited an Allegheny-Ludlum steel mill. A skilled worker at the mill explains the shaping of steel for armaments to the Sergeant, whose appreciation for the fine art of steelmaking grows by the minute. Allegheny-Steel, Pittsburgh, Pennsylvania

A poster comes to life. Sergeant Vineyard knows a lot about howitzers ...

Picryl description: Public domain image of a worker, labor, factory, plant, manufacture, industrial facility, 1930s, mid-20th-century industrial photo, free to use, no copyright restrictions.

First steam fire engine, and trip hammer

First steam fire engine, and trip hammer

2375H U.S. Copyright Office. No. 2775. Public domain photograph - ship, port, harbor, free to use, no copyright restrictions image - Picryl description

Apostle Islands, Lake Superior, Trip Hammer

Apostle Islands, Lake Superior, Trip Hammer

Locale in Presque Isle based on Detroit, Catalogue F (1899). "423" on negative. Detroit Publishing Co. no. 04728. Gift; State Historical Society of Colorado; 1949. Unverified information in this record. 752 fie... More