<?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">spirit levels</topic></authority><related type="broader"><topic>angle measuring devices</topic></related><variant type="other"><topic>level, spirit</topic></variant><variant type="other"><topic>levels</topic></variant><variant type="other"><topic>levels, spirit</topic></variant><variant type="other"><topic>spirit level</topic></variant> <note xml:lang="en"><![CDATA[ Devices for determining true horizontal or vertical angles by the centering of a bubble with a glass tube or circular case filled nearly to capacity with alcohol or ether. ]]></note></mads>