<?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">physautotypes</topic></authority><related type="broader"><topic>photographs by processing or presentation technique</topic></related><variant type="other"><topic>physautotype</topic></variant> <note xml:lang="en"><![CDATA[ Photographic process invented by Niépce and Daguerre in 1832, whereby images are produced by a process that utilized lavender dissolved in alcohol as the photosensitive agent. The resulting solution was then applied to a silver plate, and then exposed in a camera obscura for several hours. ]]></note></mads>