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

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 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".

Pauli refers to two manuscripts sent to him. He encloses a copy of a letter to Bohm outlining Pauli's criticism of Bohm's "Hidden parameters".

Pauli invites Thellung to the X mas party of his institute. He writes about Källén's work on renormalization.

Pauli expresses his delight over Destouches' impending visit in Zürich.

Pauli writes on the reasons for the identical reaction of communists and catholics against complementary and indeterminism. He is against Bohm's interpretation of quantum physics. He also comments on his lectures in the Institute Poincaré on Fierz's comparison between Mach and Descartes.

Pauli writes on a mathematical representation of Bohm's theory.

Pauli offers Thellung an assistant ship from the 1st April 1953. He writes about Källén's further work.

Pauli thanks Kronig for his letter about the two different sound waves in He II, which exists at different frequencies.