<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/xml/zthes-05.dtd">  <Zthes><term><termId>31420517</termId><termName>megalethoscopes</termName><termType>PT</termType><termNote><![CDATA[ Apparatuses invented by Carlo Ponti of Venice ca. 1870, for viewing large albumen photographs on thin paper, using a large lens to create the optical illusion of depth and perspective and having candles or kerosene lamps as a source of light. The photographs themselves were translucent, often colored and pierced with pinprick holes to create dramatic visual effects with backlighting, such as that of lights in a night scene. ]]></termNote><termCreatedDate>2026-03-30 20:53:18</termCreatedDate><relation><relationType>UF</relationType><termId>31420518</termId><termName>megalethoscope</termName><termType>ND</termType></relation><relation><relationType>BT</relationType><termId>31386070</termId><termName>photograph viewing equipment</termName><termType>PT</termType></relation></term>  </Zthes>