<?xml version="1.0" encoding="utf-8"?><mads xmlns="http://www.loc.gov/mads/" xmlns:mods="http://www.loc.gov/mods/v3" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.loc.gov/mads/
mads.xsd"><authority><topic authority="http://AATesaurus.cultura.gencat.cat/aat/getty_en">sandglasses</topic></authority><related type="narrower"><topic>hourglasses</topic></related><related type="broader"><topic>timepieces by form</topic></related><variant type="other"><topic>sand glasses</topic></variant><variant type="other"><topic>sand-glasses</topic></variant><variant type="other"><topic>sandglass</topic></variant><variant type="other"><topic>time glasses</topic></variant> <note xml:lang="en"><![CDATA[ Timepieces that measure equal periods of time by the motion of sand or other freely flowing, fine-grained substances through a narrow aperture between two triangular or conical glass bulbs arranged mouth to mouth; probably introduced in the early 14th century and used then especially for timekeeping aboard ships. ]]></note></mads>