Pauli sends his timetable for the next two months. He writes about two ways of dealing with the Uhlenbeck-Pais models, and about Glaser's approach.

Pauli writes about his renouncing the partnership with Heisenberg. He thinks there are mistakes in Heisenberg's integration of his equation. Further, if one attempts to loosen either the causality or the unitarity of the metric, this leads to disastrous results in relativistic theories. His impression is that one has to wait for new physical ideas, because mathematical virtuosity alone cannot lead to the discovery of new laws of nature.

Pauli writes about the hopeless state of quantum field theory at present. He writes about Heisenberg's ideas. He comments on a preprint by Gürsey on the group structure of elementary particles.

Letter from W. Pauli to E. Kahler.

Pauli thinks that classical field theories cannot contribute to a real solution of the problems which Landé has dealt with.

Full text is: "Disagree with roof formalism. Good otherwise. Have sent letter."