<?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">oscillographs</topic></authority><related type="other"><topic>oscilloscopes</topic></related><related type="broader"><topic>electricity measuring devices</topic></related><variant type="other"><topic>oscillograph</topic></variant> <note xml:lang="en"><![CDATA[ Measuring devices for determining and graphically recording or indicating the waveforms of changing quantities of electrical energy. In general, these are considered the same instrument as an oscilloscope, except that the oscillograph may be capable of creating a permanent record of the measurements, while the oscilloscope provides only visual feedback. ]]></note></mads>