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<rdf:Description rdf:about="https://catalogues.royalsociety.org:443/CalmView/record/catalog/HS/19/199" xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:dc="http://purl.org/dc/elements/1.1/">
  <dc:title>Tables of refractive index of lenses, by Sir John Frederick William Herschel</dc:title>
  <dc:description>Clean copy of three tables of the refractive index of combined lenses of crown and flint with varying composition, in Herschel hand. Table headings: ratio of dispersion powers; radius of surface of crown and flint (2 layers of each).</dc:description>
  <dc:date>19th century</dc:date>
</rdf:Description>