’A CURVE-TRACING TOP,’ AND A CURIOUS OPTICAL ILLUSION

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  ’A CURVE-TRACING TOP,’ AND A CURIOUS OPTICAL ILLUSION

  By C. B. WARRING

  Science09 Oct 1896 : 533-534

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  ’A CURVE-TRACING TOP,’ AND A CURIOUS OPTICAL ILLUSION

  By C. B. WARRING

  Science09 Oct 1896 : 533-534

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