Pauli asks Thellung to send him a paper about time reversibility.

Pauli writes about a seminar talk by Van Hove on Feynman's paper.

Pauli writes about a remark by Dyson on Thellung's manuscript. He mentions administrative details of a lecture program in the summer term.

Pauli reports on the congress in Rochester. He writes about his discussion with Fermi about the neutrino experiments. He writes also on a talk about a new paper by Feynman.

Pauli makes several technical requests. He writes about Stern's impending visit to Zürich.

Pauli asks Thellung to send the English edition of his book on Kepler to Rabi.

Pauli writes more about Feynman's paper. He talks about his difficulties to dealing with many excitons.

Pauli writes about equations by Yang and Mills using a two-component isotopic-spin-space.

Pauli writes about Jordan's request to send Thellung a lecture by Pauli on problems of the theory of relativity. He writes about Feynman's paper and about Watson's paper.

Pauli writes about the positive reaction of Dyson and Huang to Thellung's paper. He requests several technical things and expresses his satisfaction about Thellung's work in Zürich.