Jost is interested in Janner's problem. Pauli is going to lecture on it.

Pauli suggests a dissertation on H-theorem in quantum statistics and he summarizes Fierz latest work on it.

Pauli has returned from the USA and he plans to consider Janner's work.

Pauli writes from Princeton to Jauch in Zürich about Jauch's calculations on electron scattering. He asks questions about life in the Institute.

Pauli expresses his satisfaction about Jauch's theoretical work on electron scattering, but he doubts the experimental results. He writes about the latest results of cosmic ray research.

Pauli offers detailed comments on Jauch's calculations.

Pauli expresses his interest in the work of Hu and Lopes and gives advice on how to treat the problem in the case that a strict solution of the equations should be impossible. He comments on offprints he got from Switzerland.

Pauli writes about offprints to be sent to certain adresses in Europe. He comments on Lopes' dissertation and gives some advice about the proper personal contact with elder colleagues.

Pauli writes more about his offprints.

Pauli mentions "artificial" mesons created by accelerators and the possibility of their identity with cosmic ray mesons. He gives some comments on Jauch's work. He writes that Anisotropy of scattering cannot be explained by Delta-function.