<?xml version="1.0" encoding="utf-8"?>
<rdf:Description rdf:about="https://catalogues.royalsociety.org:443/CalmView/record/catalog/HS/10/71" 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 Alexander von Humboldt to Sir John Herschel, dated at Sans Souci</dc:title>
  <dc:description>Autograph letter signed by sender. Is grateful for his constructive letter on the Coal Sack. Regarding the work of the Schlaginweit brothers.</dc:description>
  <dc:date>11 August 1850</dc:date>
</rdf:Description>