Nuns and professor in the Department of Biology at St John's University in Brooklyn, New York, produce penicillin

Shot of exterior of Department of Biology building / words over entrance "St John's College" / Chairman of the Department of Biology Professor Edward J. Keegan working in room with two nuns / VS nun pouring liquid from glass globe into glass filter container / liquid pouring from filter into container to form mold / nun and Keegan looking at mold formed in flask / nun looking at mold in flask / nuns and Keegan looking at mold in flasks / nun puts desiccator rod in tube / hand of nun heating desiccator rod over flame / Keegan and nun looking at plates on table with mold on them / hands of Keegan holding tube with mold in it / Note: exact day not known