<?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">quadrants</topic></authority><related type="narrower"><topic>Davis quadrants</topic></related><related type="broader"><topic>vertical angle measuring devices</topic></related><variant type="other"><topic>quadrant</topic></variant> <note xml:lang="en"><![CDATA[ Instruments for measuring altitudes, usually consisting of a graduated arc of 90 degrees, a pair of sights, and a plumb bob. ]]></note></mads>