| Title | Correspondence with Dr WF Giauque, University of California, Berkeley; Dr W Meissner, Physics Technical Institute, Berlin and Prof P Debye, Kaiser Wilhelm Institute of Physics, Berlin, |
| Description | Correspondence with Dr WF Giauque, on low temperature research work and Simon's visits to the Magnet Laboratory in Bellevue, near Paris, to carry out adiabatic demagnetization work, 1933-1937.
Correspondence with Dr Walther Meissner, on Meissner's low temperature work, including a draft of a paper by Meissner, 'Erzeugung tiefster Temperaturen durch Kompression von flüssigem Helium (Production of low temperatures by compression of liquid helium)', 1926-1936.
Correspondence with Prof P Debye, on low temperature work including a draft of a paper by Debye, 'Die magnetische Methode zur Erzeugung tiefster Temperaturen (The magnetic method for the production of low temperatures)', 1934-1938.
In 1926 Debye and Giauque had proposed the magnetic cooling method to reach temperatures down to 0.001 °K |