<?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">mercury barometers</topic></authority><related type="broader"><topic>barometers</topic></related><variant type="other"><topic>barometer, mercury</topic></variant><variant type="other"><topic>barometers, mercurial</topic></variant><variant type="other"><topic>barometers, mercury</topic></variant><variant type="other"><topic>mercurial barometers</topic></variant><variant type="other"><topic>mercury barometer</topic></variant> <note xml:lang="en"><![CDATA[ Barometers that measure atmospheric pressure by measuring the height of a column of mercury that the atmosphere will support. ]]></note></mads>