. English: The view through the level used by Alfred Russel Wallace in the Bedford Level experiment, a wager between him and John Hampden to demonstrate the curvature of the earth. This diagram was printed in The Field, a sports magazine and reproduced in Wallace's autobiography. 26 March 1870. Chris55 1249 Wallace-bedford-level

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Size: 2552px × 1959px
Photo credit: © The Picture Art Collection / Alamy / Afripics
License: Licensed
Model Released: No

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