<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/xml/zthes-05.dtd">  <Zthes><term><termId>31457214</termId><termName>Prince&apos;s metal</termName><termType>PT</termType><termNote><![CDATA[ Refers to an alloy used in the jewelry and watch trade during the 17th and 18th centuries, mostly in England; it was golden in color and was probably an alloy of copper and zinc that resembled brass. Some sources specifically describe it as a type of brass with a composition of three parts copper to one of zinc pickled in a diluted spirit of vitriol and then immersed in aquafortis before burnishing. Prince's metal was supposedly invented by Prince Rupert of the Rhine. ]]></termNote><termCreatedDate>2026-03-30 21:03:04</termCreatedDate><relation><relationType>UF</relationType><termId>31457215</termId><termName>Prince Rupert&apos;s metal</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31457216</termId><termName>Princes&apos; metal</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31457217</termId><termName>Rupert&apos;s metal</termName><termType>ND</termType></relation><relation><relationType>BT</relationType><termId>31438444</termId><termName>copper alloy</termName><termType>PT</termType></relation><relation><relationType>BT</relationType><termId>31457188</termId><termName>brass</termName><termType>PT</termType></relation></term>  </Zthes>