<?xml version="1.0" encoding="utf-8"?>
<rdf:Description rdf:about="https://catalogues.royalsociety.org:443/CalmView/record/catalog/EL/S1/61" 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 Renatus Slusius to Henry Oldenburg</dc:title>
  <dc:description>Concerning reply to John Wallis on cylindroids; concerning newly-printed books to be acquired; demonstrates a method for finding the foci of any conic section
Mathematical figures in text</dc:description>
  <dc:date>10 March 1670</dc:date>
</rdf:Description>