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Photo of Hob grate, 17th century - Public domain dedication
Carron Foundry (Scottish, founded 1759) Public domain photograph of 17th-century metal object, free to use, no copyright restrictions image - Picryl description
Auto conversion to airplane engines. With normal operations of this au...
Public domain photograph of New York in 1930s, free to use, no copyright restrictions image - Picryl description