Pauli writes about a paper he is writing for the Sommerfield issue of Physics Reviews.

Pauli writes about the impossibility of his returning to Switzerland during the war. He writes about new experiments with cosmic rays and about nuclear forces.

Pauli makes more remarks about Schwinger's theory.

Pauli writes about a possible visit to Chicago. He writes about his work on the English edition of his relativity article.

Pauli comments on a paper by Weyl published in Z. Phys. about quantum physics and group theory.

Pauli thanks Weyl for his book on the philosophy of mathematics and natural science. He makes two critical remarks: 1) It is not correct to connect Leibniz with the principle of exclusion. 2) There is no asymmetry of the past-future relation in spontaneous radiation processes, but the concept of spontaneity needs a better definition.

Pauli comments on a paper by Weyl published in the April issue of Proc. Nat. Acad. Sci. He writes about Lagrange's function. He writes about quantization of field equations. He asks Weyl about his future plans.

Pauli thanks Wightman and Michel for the study of his paper. He remarks on a priority question regarding Schwinger's paper of 1951. He writes about properties of isotopic spin spaces. He writes about "Schwinger's school" and "Wigner's school".

Pauli gives his opinion on a candidate for a second chair in theoretical physics in Hamburg.

Pauli writes about his impending trip to the USA. He writes about his work with Heisenberg.