<?xml version="1.0" encoding="utf-8"?>
<rdf:Description rdf:about="https://catalogues.royalsociety.org:443/CalmView/record/catalog/MS/877/3/17" xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:dc="http://purl.org/dc/elements/1.1/">
  <dc:title>Notes, 'Huyghens (English) eyepiece,' Alexander Eugen Conrady</dc:title>
  <dc:description>Explores convergent (coincident first focal points) systems through both Christiaan Huyghens' and Jesse Ramsden's principles. Includes a graph of Huyghens' eyepiece. The subject was discussed in A. E. Conrady's, Applied Optics and Optical Design, Volume I. Oxford 1929. </dc:description>
  <dc:date>[1921]</dc:date>
</rdf:Description>