Pauli writes more about the invariant weight factor in the commutation rules.

Pauli writes a letter of condolence to Mrs Hecke some time after the death of E Hecke in 1947 tracing some of Hecke's characteristic attitudes in life.

Pauli wants to speak at Bern Physics Colloquium.

Pauli discusses of a forthcoming journey to Sweden.

Pauli writes more about his plans for his visit to Sweden.

Pauli comments on a paper writtent by Davydov published in: Russian Journal of Physics. The papers concern irreversibility in quantum mechanics. He also writes on the recent results in cosmic-ray physics by Powell.

Pauli hopes to meet Lise Meitner with Klein in Stockholm on 20 Sept.

Pauli writes of Oppenheimer's ideas about the mathematical results of quantum-electrodynamics, and of Pauli's intention to calculate the higher approximation of the Compton-effect. He also comments on Fierz's paper about Newton. Pauli attached a copy of Oppenheimer's letter is attached.

Pauli thanks de Broglie's for his contribution to the issue of the "Dialectica" dedicated to the problems of complementarity and he makes some comments on it.