<?xml version="1.0" encoding="utf-8"?>
<rdf:Description rdf:about="https://catalogues.royalsociety.org:443/CalmView/record/catalog/EL/S1/79" 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>That the letter with enquiries has arrived but is unable to answer them; concerning Henry Aldridge, nephew of Robert Boyle, who delivered another letter; mentioning that he is able to demonstrate the rule of centrobarics of Guldin (relating to convex curved surfaces)</dc:description>
  <dc:date>13 September 1673</dc:date>
</rdf:Description>