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united states history

1940 s

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Platform at entrance to tunnel. The gold ore taken from the tunnel requires a built-up platform at the entrance to facilitate handling. Telluride, Colorado

Platform at entrance to tunnel. The gold ore taken from the tunnel req...

Public domain photograph of life in the United States in the 1930s, free to use, no copyright restrictions image - Picryl description

Production. War housing trailers. The side of a war housing trailer nears completion on a table-top jig at Western Trailer Company's plant in Los Angeles. Exceptional strength is secured through built-up construction of Masonite over plywood with a casein bond. The side is secured to spacers with drive screws

Production. War housing trailers. The side of a war housing trailer ne...

Picryl description: Public domain image of an industrial building, factory, workshop, workers, 19th-20th century, free to use, no copyright restrictions.

Built-up roads across gulleys - safety film negatives, Library of Congress

Built-up roads across gulleys - safety film negatives, Library of Cong...

Public domain photograph of a mountain pass, mountains, nature, mountain range, view, landscape, rocks, free to use, no copyright restrictions - Picryl description

Defense housing, Erie, Pennsylvania. A built-up roofing is applied to the individual unit. Here a workman tends to the vat in which the pitch is kept molten. Pitch is hoisted to the roof in buckets

Defense housing, Erie, Pennsylvania. A built-up roofing is applied to ...

Picryl description: Public domain image of a construction site, industrial or commercial building, free to use, no copyright restrictions.

Defense housing, Erie, Pennsylvania. A built-up flat roofing is applied to the individual unit. Here workmen are laying the last covering before the finished coat

Defense housing, Erie, Pennsylvania. A built-up flat roofing is applie...

Public domain photograph of Pennsylvania in 1930s, free to use, no copyright restrictions image - Picryl description

Substitute materials. Interior view of two-foot section of built-up wooden pipe, twenty-four inches in diameter. These pipes, used in place of corrugated iron or reinforced concrete pipes, are made of sections cut from short lengths of wood. About 100,000 feet of these wooden pipes were installed in 1942 in drainage culverts, storm sewers and conduits under highways and at army camps, naval stations, airfields and ordnance plants

Substitute materials. Interior view of two-foot section of built-up wo...

Public domain photograph of indoor, interior activity, America in the 1930s, free to use, no copyright restrictions image - Picryl description