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<rdf:Description rdf:about="https://catalogues.royalsociety.org:443/CalmView/record/catalog/MS/877/3/7" xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:dc="http://purl.org/dc/elements/1.1/">
  <dc:title>Lecture, 'Pseudo-achromatism of eyepieces,' by Alexander Eugen Conrady</dc:title>
  <dc:description>Begins by discussing systems with achromatized focal lengths, followed by systems with coincident first focal points from the point of view of colour variation. Examines both convergent and divergent systems.</dc:description>
  <dc:date>[1921]</dc:date>
</rdf:Description>