Illustration from Theatrum Machinarum Novum 1661 by Georg Andreas Böckler; A human powered milling machine

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Illustration from Theatrum Machinarum Novum 1661 by Georg Andreas Böckler; A human powered milling machine; The machine is powered by a large wheel treadmill

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Size: 3151px × 4184px
Photo credit: © Timewatch Images / Alamy / Afripics
License: Licensed
Model Released: No

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