Pauli invites Hulthén to contribute to the Bohr issue, published in: Review of Modern Physics: (1945), Vol. 17.

Pauli reports on the stops during his journey to Zurich, Powell's doubts about Amaldi's results, problems of Wentzel and Villars with "strong coupling theory", and Dirac's latest views. He criticizes Gustafson's work, Peng's removal of divergences in meson theory and Heisenberg's S-matrix theory.

Pauli discusses the implication of forward neutron scattering for meson theory. He describes the attempt to obtain relativistic theory of deuteron quadrupole moment, and reports on his trip to Harvard.

Pauli discusses about Ning Hu's difficulties applying the relativistic Rosenfeld-Moller theory, the work of Wentzel and Lopes on "strong coupling" as explanation of Amaldi's results, and the war-time fates of Casimir, Kahn and Amaldi.

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 thinks that he should remain in the U.S.A. until the end of the war. He asks Jauch to send him his lecture notes. He discusses the problems of electron scattering. He writes of theories about the meson in the U.S.A. and about experiments with proton-proton scattering.

Pauli discusses the treatment of interaction between heavy particles and electrons. He comments on Marshak and Weisskopf'calculations. The main problem is now the creation of mesons in explosions.

Pauli discusses a work by Wilson on the influence of damping on the brems-radiation of mesons with spin 1.

Pauli thanks Jauch for Jauch's and Rohrlich's book and says that he likes it. He gives some comments on a few passages. He writes about recent publications on field quantization.