<?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">retort holders</topic></authority><related type="broader"><topic>labware</topic></related><variant type="other"><topic>retort holder</topic></variant><variant type="other"><topic>ring stand</topic></variant> <note xml:lang="en"><![CDATA[ Scientific equipment to which chemical or other laboratory equipment can be fixed when in use, typically consisting of a heavy base supporting a vertical metal rod to which clamps can be attached to hold test tubes or burettes for experiments in titration or for filtering. ]]></note></mads>