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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 welcome's Jauch's impending appointment in Princeton University and gives advice as to the negotiations about working conditions. Enough time for research is vital. He comments on the difficult paper by Dirac. He suggests a problem in the same area (application to "infra-red catastrophe"). He writes of his plans for a joint investigation with Kusaka about application of the strong-coupling formalism on a mixture of mesons of zero spin and spin 1 (Rosenfeld-Möller theory).

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.

Pauli writes about his renouncing the partnership with Heisenberg. He thinks there are mistakes in Heisenberg's integration of his equation. Further, if one attempts to loosen either the causality or the unitarity of the metric, this leads to disastrous results in relativistic theories. His impression is that one has to wait for new physical ideas, because mathematical virtuosity alone cannot lead to the discovery of new laws of nature.

Pauli takes an interest in Jauch's scientific development and hopes to find a position for him. He writes of his own work with Fierz. He hopes to succeed in getting rid of the spinor-calculus.