<?xml version="1.0" encoding="utf-8"?>
<rdf:Description rdf:about="https://catalogues.royalsociety.org:443/CalmView/record/catalog/EL/H1/43" xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:dc="http://purl.org/dc/elements/1.1/">
  <dc:title>Copy of a letter, from Christian Huygens to Robert Moray</dc:title>
  <dc:description>Concerning a new instrument for grinding lenses; new vehicles for travel; concerning his universal measure; concerning a portable thermometer; concerns measuring the refractions of the sun; concerning Hooke's instrument for measuring the descent of falling bodies; observations of the comet in 1664 (with figures)</dc:description>
  <dc:date>1665</dc:date>
</rdf:Description>