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Luigi Palmieri
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Palmieri, Luigi: seismograph
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Luigi Palmieri

Italian scientist

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design of seismometer

  • Zhang Heng: seismoscope
    In seismograph: Development of the first seismographs

    In 1855 Italian scientist Luigi Palmieri designed a seismograph that consisted of several U-shaped tubes filled with mercury and oriented toward the different points of the compass. When the ground shook, the motion of the mercury made an electrical contact that stopped a clock and simultaneously started a recording…

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