<?xml version="1.0" encoding="utf-8"?>
<rdf:Description rdf:about="https://catalogues.royalsociety.org:443/CalmView/record/catalog/HS/17/461" xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:dc="http://purl.org/dc/elements/1.1/">
  <dc:title>Letter, from W[ilhelm] Veltmann to Sir John Herschel, dated at Oberhausen</dc:title>
  <dc:description>Autograph letter signed by sender. Apologizes for not acknowledging John Frederick William Herschel's work. Asks for copy of Royal Geographical Society's papers. Discusses [François] Arago's work on light beams and prisms. Requests John Frederick William Herschel's opinion concerning [Wilhelm] Klinkerfues's theory of light, which seems to make [Augustin] Fresnel's hypothesis superfluous.</dc:description>
  <dc:date>14 August 1869</dc:date>
</rdf:Description>