<?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">Savart wheels</topic></authority><related type="broader"><topic>sound devices</topic></related><variant type="other"><topic>Savart&apos;s wheel</topic></variant><variant type="other"><topic>savart wheel</topic></variant><variant type="other"><topic>wheels, savart</topic></variant> <note xml:lang="en"><![CDATA[ Acoustic devices composed of a toothed spinning wheels that create tones if a blade or plectrum is held against them. Tones varying due to the speed or size of the wheel. Invented by French physicist Félix Savart. His invention was later adapted as a component of the tone wheel organ. ]]></note></mads>