<?xml version="1.0" encoding="utf-8"?>
<rdf:Description rdf:about="https://catalogues.royalsociety.org:443/CalmView/record/catalog/HF/1/3/2/6/24" 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 Howard Walter Florey to J W Trevan, Wellcome Foundation, Beckenham</dc:title>
  <dc:description>Discusses carbon and acetone elution process for isolating two products from different moulds - doubtful if there are many different penicillins with similar biological properties and chemical differences - arguments about chemical properties.</dc:description>
  <dc:date>21 November 1942</dc:date>
</rdf:Description>