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<rdf:Description rdf:about="https://catalogues.royalsociety.org:443/CalmView/record/catalog/HF/1/3/2/19/96" 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 R V Christie, St Albans</dc:title>
  <dc:description>Has received penicillin (calcium salt) from ICI - activity only 150u/mg compared with 800-900 u/mg of stuff from Pfizer - should not spend time using inferior products - needs maximum activit per mg for his purposes - are there any prospects of getting better stuff - British material more painful and does not always dissolve cleanly in water - has Glaxo stuff of 600 u/mg - do they have calcium salt like that.</dc:description>
  <dc:date>4 April 1945</dc:date>
</rdf:Description>