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<rdf:Description rdf:about="https://catalogues.royalsociety.org:443/CalmView/record/catalog/HF/1/3/3/6/103" 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 F Roffey, Distillers Company Ltd, St James's Square, London to Howard Walter Florey</dc:title>
  <dc:description>Says he is sending a sample of sodium penicillin G - gives details of its potency - says that supplies of that grade are limited as it has only been produced experimentally - says he can send samples of something more coloured with potency of 1500/1550 units per mg.</dc:description>
  <dc:date>9 June 1948</dc:date>
</rdf:Description>