Webpoets, painters, and photographers have long treasured the mellow light of twilight, when the sky softens and deepens into a glow, or gently brightens as sunrise. Weban hourglass (or sandglass, sand timer, or sand clock) is a device used to measure the passage of time. It comprises two glass bulbs connected vertically by a narrow neck that. Webthe hourglass maker must test the instrument and fine tune it to measure the correct length of time. There are many factors that contribute to the ability of an. Webhow measuring time shaped history from neolithic constructions to atomic clocks, how humans measure time reveals what we value most Webduring the night, ancient people could track time by the apparent movement of the stars from east to west, gautschy says. And for measuring discrete units of time,. Webhourglass, an early device for measuring intervals of time. It is also known as a sandglass or a log glass when used in conjunction with the common log for ascertaining the speed. Webin their introduction they observe that while “the same sands” run through an hourglass, the hours they represent pass “forever. ” one scholar, writing about the.