In connection with a planned lecture on cosmological problems of the theory of relativity Pauli asks for clarification on several points in Jordan's book.

Pauli makes several criticisms of Jordan's book.

New research on Zürich nightlife.

Pauli asks for an offprint of Jordan's paper on complementarity in Rhine's experiments. He writes of his discussion with Jung about this subject.

Pauli makes two additions to the last letter. He thinks that Jordan's model with gravitational constant does not differ in principle from models with constant k.

Pauli makes more remarks about biology. Science can deal only with reproducible events. Historically unique events lie outside the domain of science although they are part of nature.

Pauli writes about the date of a conference in Mainz where Pauli intends to lecture on "Die Wissenschaft und das abendländische Denken". He plans to write a paper on "Exclusion principle, Lorentz group and reflexions of space-time and charge".

Pauli replies to a number of printed papers from Jordan: on Jordan's 5-dimensional theory, on his theory of formation of stars, and about quoting Pauli in publications on parapsychology.

Pauli writes on technicalities about Pauli's impending visit to Hamburg.

Pauli agrees with Källén about an error in Thirring's paper. The question now is whether Hurst's paper is correct.