HUMBOLDT MEASURING SOUND. /nAlexander von Humboldt, Joseph Louis Gay-Lussac, and Alexis Bouvard attempting to establish the speed of sound by measuring the time between the observation of a lightning flash and hearing the sound of a cannon shot, 22 June 1822, Paris, France. Line engraving, 19th century.
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TOP16117464
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達志影像
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RM
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