| Description | Correspondents: Dr Otto Ruff, University of California; Ruhemann, University of Stuttgart; Prof A Smits, Amsterdam University; Dr Frank H Spedding, University of California; Prof Karl Scheel; Prof R Schenck; Prof Walter Schottky; Dr Ernst Stueckelberg, Dr Erich Thilo; Prof von Wartenberg; Ralph Witt, Johns Hopkins University, Baltimore, USA and Prof Mieczyslaw Wolfke, Warsaw, Poland |