an hourglassuses the movement of the sun to determine time is it true
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Hourglass, 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 of a ship. It consists of two pear-shaped bulbs of glass, united at their apexes and having a minute passage formed between them
An hourglass (or sandglass, sand timer, sand clock or egg timer) is a device used to measure the passage of time. ... Typically the upper and lower bulbs are symmetric so that the hourglass will measure the same duration regardless of orientation.
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