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<rdf:Description rdf:about="https://catalogues.royalsociety.org:443/CalmView/record/catalog/MC/4/99" 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 William Alexander, Halifax, to Charles Richard Weld, [Assistant Secretary of the Royal Society]</dc:title>
  <dc:description>Wishing to submit or present his paper 'On the injurious mechanical agencies of grit dust in the quarrying and chipping of Sand-stone' and his related invention for the protection of workmen's respiratory systems.
[The back of the letter contains two light sketches of containers, possibly relating to his invention.]</dc:description>
  <dc:date>25 November 1845</dc:date>
</rdf:Description>