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<rdf:Description rdf:about="https://catalogues.royalsociety.org:443/CalmView/record/catalog/EL/W3/12" 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 Joseph Walsh to Theodore de Vaux</dc:title>
  <dc:description>States that he has sent several types of clay to the Royal Society and gives an account of some of them; discussing 'bole armoniack', a red earth or clay, which Thomas Morris compounded; discussing a 'yellow oker' used for colouring leather
Read to the Royal Society on 6 February 1668</dc:description>
  <dc:date>20 January 1668</dc:date>
</rdf:Description>