General correspondence from Breslau: H-R Correspondents: Prof WJ de Haas, University of Leiden; Prof F Haber; Prof F Henning; Prof Herzog, Kaider Wilhelm Institute, Berlin; Prof WH Keesom, University of Leiden; Prof R Ladenburg, Princeton University; Prof Erich Lange, University of Erlangen; Dr Fritz London, Berlin University; Prof H Mark; Dr W Meissner, University of Berlin; Prof RJ Meyer; Prof KH Meyer; Prof W Nernst; Prof M Pirani; Dr F Politzer and Prof C Ramsauer 1931-1933