<?xml version="1.0" encoding="utf-8"?>
<rdf:Description rdf:about="https://catalogues.royalsociety.org:443/CalmView/record/catalog/HS/6/155" xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:dc="http://purl.org/dc/elements/1.1/">
  <dc:title>Incomplete letter, from Warren de La Rue to Sir John Herschel, dated at Observatory, Cranford</dc:title>
  <dc:description>Autographed letter, incomplete. Appreciates the difference between Robert Hooke's and John Frederick William Herschel's suggestions for a helioscopic telescope. Comments on these suggestions. Has recently constructed a reflecting prism. Comments on this.</dc:description>
  <dc:date>3 July 1864</dc:date>
</rdf:Description>