<?xml version="1.0" encoding="utf-8"?>
<rdf:Description rdf:about="https://catalogues.royalsociety.org:443/CalmView/record/catalog/LBO/2/105" xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:dc="http://purl.org/dc/elements/1.1/">
  <dc:title>Copy extract letter from Samuel Colepresse, Leyden,  to Henry Oldenburg</dc:title>
  <dc:description>Concerning the making of an artificial opal, red glass, and crystal</dc:description>
  <dc:date>7 August 1668</dc:date>
</rdf:Description>