<?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">gravimeters</topic></authority><related type="broader"><topic>gravity measuring devices</topic></related><variant type="other"><topic>gravimeter</topic></variant><variant type="other"><topic>gravity meters</topic></variant><variant type="other"><topic>meters, gravity</topic></variant> <note xml:lang="en"><![CDATA[ Instruments for measuring variations in the gravitational field of the earth by detecting small differences in the weight of an object of constant mass. ]]></note></mads>