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  • An experiment on a bird in an air pump: a philosopher is demonstrating the formation of a vacuum by withdrawing air from a flask containing a white cockatoo. Mezzotint by V. Green, 1769, after J. Wright of Derby.
  • An experiment on a bird in an air pump: a philosopher is demonstrating the formation of a vacuum by withdrawing air from a flask containing a white cockatoo. Mezzotint by V. Green, 1769, after J. Wright of Derby.