<?xml version="1.0" encoding="utf-8"?>
<rdf:Description rdf:about="https://catalogues.royalsociety.org:443/CalmView/record/catalog/RB/2/16/13" xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:dc="http://purl.org/dc/elements/1.1/">
  <dc:title>'Advertisement' to an unpublished essay</dc:title>
  <dc:description>'Advertisement' to an unpublished essay 'haveing [sic.] been written many years since', to show that light's 'origine is mechanical'. Apparently intended for the unpublished 'Mechanical Production of Light'.
\r\nHand: Smith</dc:description>
  <dc:date>c 1686</dc:date>
</rdf:Description>