<?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">alchemy</topic></authority><related type="other"><topic>alchemists</topic></related><related type="broader"><topic>occult sciences</topic></related><related type="broader"><topic>philosophy</topic></related><related type="broader"><topic>chemistry</topic></related> <note xml:lang="en"><![CDATA[ A form of chemistry and speculative philosophy practiced in the Middle Ages and the Renaissance and concerned principally with discovering methods for transmuting base metal into gold and with finding a universal solvent and an elixir of life. ]]></note></mads>