<?xml version="1.0" encoding="utf-8"?>
<rdf:Description rdf:about="https://catalogues.royalsociety.org:443/CalmView/record/catalog/HF/1/3/2/8/19" 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 Leonard Colebrook</dc:title>
  <dc:description>Sending a sample of highly pigmented but active penicillin - note number of units of material - units significant not the dry weight - discusses the making and administration of the penicillin and unemul mixture - is working on a tylose preparation - penicillin seems quite stable on it.</dc:description>
  <dc:date>23 April 1942</dc:date>
</rdf:Description>