General correspondence from Breslau: J-Q Correspondents: 'IG Farben'; Dr IC Keeley, Clarendon Laboratory, Oxford; Prof WH Keesom, University of Leiden; Prof George Kistiskowsky, Harvard University; Nicholas Kurti, Berlin University; Prof R Ladenburg, Princeton University; Dr Irving Langmuir, General Electric Co.; Prof G Lewis, University of California; Prof MacLennan, Toronto University, Canada; Kurt Mendelssohn; Dr von Rottenburg; Prof Erich Muller; Prof W Nernst; Prof Polanyi, Kaiser Wilhelm Insititute, Berlin and Dr F Pollitzer, University of California 1931-1933