On October 4, 1675, prominent Dutch mathematician and scientist Christiaan Huygens patented a pocket watch. Huygens was a leading scientist of his time, who established the wave theory of light and made outstanding astronomical discoveries. He also patented the first pendulum clock in 1656, which he has developed to meet his need for exact time measurement while observing the heavens. “…the power of this line [the cycloid] to measure time.” – Christiaan…Read more
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