<?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">actinometers</topic></authority><related type="narrower"><topic>actinographs</topic></related><related type="narrower"><topic>pyrheliometers</topic></related><related type="other"><topic>actinometry</topic></related><related type="broader"><topic>radiant energy measuring devices</topic></related><variant type="other"><topic>actinometer</topic></variant> <note xml:lang="en"><![CDATA[ Any instrument used to measure the intensity of radiant energy, especially of the sun. ]]></note></mads>