<?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">arc lamps</topic></authority><related type="other"><topic>lighthouse lamps</topic></related><related type="other"><topic>electric arcs</topic></related><related type="broader"><topic>electric lamps</topic></related><variant type="other"><topic>Holmes arc lamps</topic></variant><variant type="other"><topic>arc lamp</topic></variant><variant type="other"><topic>arc lamps, Holmes</topic></variant><variant type="other"><topic>arc lights</topic></variant><variant type="other"><topic>lamps, Holmes arc</topic></variant><variant type="other"><topic>lamps, arc</topic></variant><variant type="other"><topic>lights, arc</topic></variant> <note xml:lang="en"><![CDATA[ Electric lamps in which the current is made to traverse an air gap between two electrodes, usually of carbon. The air in the gap as well as the two electrodes become heated to a brilliant incandescence. ]]></note></mads>