<?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">sympiesometers</topic></authority><related type="broader"><topic>barometers</topic></related><variant type="other"><topic>sympiesometer</topic></variant> <note xml:lang="en"><![CDATA[ Barometers of the type in which the column of liquid in the tube has above it a body of confined air or other gas (instead of a vacuum as in the mercurial barometer), so that the pressure of the atmosphere acts against the weight of the liquid and the elastic pressure of the gas; a thermometer is attached for correction of the readings according to the expansion or contraction of the gas with changes of temperature. ]]></note></mads>