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"Test your strength," county fair, central Ohio

"Test your strength," county fair, central Ohio

Public domain photograph of Great Depression era, artistic, art photography, free to use, no copyright restrictions image - Picryl description

"Test your strength," county fair, central Ohio

"Test your strength," county fair, central Ohio

Picryl description: Public domain photograph of worker, marketplace, vendor, 1930s, Great Depression, economic conditions, free to use, no copyright restrictions.

Studies and tests are continuous on bubble-towers, exchangers, fired-heatrs, and their component parts ; Furnace headers are tested for pressure drop, corrosion, erosion, strength.

Studies and tests are continuous on bubble-towers, exchangers, fired-h...

Public domain scan of artwork related to technological or industrial history, free to use, no copyright restrictions image - Picryl description

"Test your strength," county fair, central Ohio

"Test your strength," county fair, central Ohio

Picryl description: Public domain photograph of worker, marketplace, vendor, 1930s, Great Depression, economic conditions, free to use, no copyright restrictions.

Can your child do these stunts?
"Test your strength," county fair, central Ohio

"Test your strength," county fair, central Ohio

Public domain photograph of Great Depression era, artistic, art photography, free to use, no copyright restrictions image - Picryl description