Clocks run through the history of physics. Galileo conceived of using the pendulum as a timing device on watching a hanging lamp swing in Pisa cathedral; Huygens invented the pendulum clock; and Einstein thought about clock synchronization in his Gedankenexperiment that led to relativity. Stokes derived his law in the course of investigations to determine the effect of a fluid medium on the swing of a pendulum. I sketch the work that has come out of this, Stokes drag, one of his most famous results. And to celebrate the 200th anniversary of George Gabriel Stokes’ birth I propose using the time of fall of a sphere through a fluid for a sculptural clock—a public kinetic artwork that will tell the time. This article is part of the theme issue ‘Stokes at 200 (part 2)’.

中文翻译：

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斯托克斯定律、粘度计和斯托克斯落球钟

时钟贯穿物理学的历史。伽利略设想使用钟摆作为观看比萨大教堂吊灯摆动的计时装置；惠更斯发明了摆钟；爱因斯坦在他的 Gedanken 实验中考虑了时钟同步，这导致了相对论。斯托克斯在研究过程中推导出了他的定律，以确定流体介质对钟摆摆动的影响。我勾勒出由此产生的作品，斯托克斯拖拽，这是他最著名的成果之一。为了庆祝乔治·加布里埃尔·斯托克斯 (George Gabriel Stokes) 诞辰 200 周年，我建议将球体通过流体坠落的时间用于雕塑时钟——一种可以报时的公共动态艺术品。本文是主题问题“斯托克斯 200（第 2 部分）”的一部分。