<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/xml/zthes-05.dtd">  <Zthes><term><termId>31375071</termId><termName>crown glass</termName><termType>PT</termType><termNote><![CDATA[ Flat pane glass made by blowing a bubble of glass, transferring it from a blow-pipe to a rod, cutting it open, then rapidly rotating it until, by centrifugal force, it is spread into a flat disk. Can be either small individual panes with so-called bulls-eyes in the centers or large disks that are annealed and cut into pieces. Crown glass is thin and brilliant with a slight convexity and concentric wavy lines. Known to the ancient Romans throughout the Empire; found in windows of medieval cathedrals. ]]></termNote><termCreatedDate>2026-03-30 20:41:08</termCreatedDate><relation><relationType>UF</relationType><termId>31375072</termId><termName>disc-blown glass</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31375073</termId><termName>glass, crown</termName><termType>ND</termType></relation><relation><relationType>BT</relationType><termId>31344445</termId><termName>glass by technique</termName><termType>PT</termType></relation><relation><relationType>NT</relationType><termId>31412016</termId><termName>bull&apos;s eye glass</termName><termType>PT</termType></relation></term>  </Zthes>