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Three balloons travel over a polar landscape: proposed method of reaching the North Pole by J.P. Cheyne. Coloured wood engraving by C. Roberts, 1877.

Original public domain image from Wellcome Collection

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Three balloons travel over a polar landscape: proposed method of reaching the North Pole by J.P. Cheyne. Coloured wood engraving by C. Roberts, 1877.

More