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https://creativecommons.org/publicdomain/zero/1.0/https://www.rawpixel.com/image/14001075

Technology: a lock (top) and a chair (below). Engraving by J. Taylor after C. Varley.

Original public domain image from Wellcome Collection

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Technology: a lock (top) and a chair (below). Engraving by J. Taylor after C. Varley.

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