Talk:Hourglass puzzle: Difference between revisions
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Revision as of 04:15, 30 December 2020
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The term hourglass is a device used to measure one hour.
The generic term for such a device is a sandglass, which can measure specific times (set/defined during manufacture); usually filled with a fine (dry) sand, pouring (by gravity) from one vessel to another. -- Gerard Schildberger (talk) 04:14, 30 December 2020 (UTC)