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  1. by on - Research

    Among the many mechanical models based on Leonardo da Vinci’s drawings, several purport to illustrate his experiments on friction. This article traces the history of these models and examines them critically in the light of recent research into Leonardo’s studies of friction.

  2. by on - Research

    This article describes the process and outcomes of a research project that involved reconstructing Alexander Graham Bell and Clarence J Blake’s ear phonautograph, an 1874 curiosity that used an excised human middle ear to visually inscribe sound waves.

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