Penicillin, Past, Present and Future -- At the Imperial College of Science, London, Professor I.M. Heilbron (foreground), and Doctor A.H. Cook are also at work on the problem of Synthesis. Professor Elibron was formerly Professor of Organic Chemistry at Manchester University, won an international reputation for his work on Vitamin A. "We know the simple fragments", says D.Cook "how many windows, how many doors penicillin has. Now working without the are ***** plan. The substances we produce go f