Pauli gives some details of the paper written by Møller and Stückelberg at the conference in Copenhagen on S-matrix formalism.

Pauli writes mostly on personnal matters

About E. von Kahler's health and discussions concerning biology, especially with Bohr.

Pauli writes on the symbolic significance of trinity and quaternity, with reference to the polemic between Kepler and Fludd. He also writes on the problem of opposites: compensatory opposites and complementary opposites. He also develops the subject of the conceptual shortcoming of the field concepts.

Pauli writes on Schopenhauer's philosophy in the light of modern physics and psychology. For Pauli Eros and Logos are complementary opposites.

Pauli writes that he accepts the invitation to a lecture at the Institute Henri Poincaré and suggests to give the talks in English. The subject of the lectures is "selected chapters of the theory of quantized fields".