A wooden hourglass. In other languages it's called 'timglas' (swedish), 'sanduhr' (german), 'Reloj de arena' (spanish), 'zandloper' (dutch), 'klepsydra' (polish), 'ampulheta' (portuguese). Image taken by Martin Olsson (mnemo on wikipedia and commons, martin@minimum.se), 18th of June 2005. This image is published on Wikipedia Commons by Martin Olsson under the GFDL license.
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