Pauli says that he does not agree with Kronig's prejudice against the USA. He makes comments on Kronig's work in connection with Jordan's neutrino theory.

Pauli replies to a letter by Landé criticizing a theory which he develops.

Pauli comments on J. Leite Lopes' letter of 12 August 1944, and in particular the integral operators used by Lopes.

Pauli asks two questions concerning a work by J. Leite Lopes, one about the use of the angular momentum-integral, and the other about the necessity of an additional term in an equation by Schrödinger.

W. Pauli thanks A. Löwy for having lent him literature on biology, especially two works by R. Goldschmidt. Goldschmidt considered as a 'mystic of hazard'. Comments on his thinking. Pauli mentions that he has joined his own translation of a letter by Bohr.

About biology. W. Pauli comments on the thinking of C. H. Waddington ('The evolution of adaptation'), R. Goldschmidt and Simpson.

Pauli gives hi views and asks questions on meson interactions in connection with a paper by Matthews.

Pauli reports on exchanges with Einstein and Baade on relativity. He suggests topics, participants and scope of the Bern relativity congress, 1955.

Pauli expresses doubts about analytic continuation of S-matrix. He says that a determination of S is needed.

Pauli supports Pais' application to come to Princeton. He is favourably impressed by Pais' work.