<?xml version="1.0" encoding="utf-8"?>
<rdf:Description rdf:about="https://catalogues.royalsociety.org:443/CalmView/record/catalog/FS/7/2/214/3" 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 Dr R Havens, Naval Research Laboratory, Washington DC, to Simon, on 
sampling the upper atmosphere with the help of liquid hydrogen, and the workings of a hydrogen liquifier</dc:title>
  <dc:description></dc:description>
  <dc:date>23 January 1950</dc:date>
</rdf:Description>