Pauli writes about a letter written by Schafroth who suggests an explanation of supraconductivity. He comments on a discussion on evolution in a meeting of biologists, in which Pauli participated and on the reasons for the resentment of physicists by biologists.

Pauli writes on the difficulties of quantum electrodynamics and the various attempts to overcome them. Pauli expresses doubts about the renormalization method.

Pauli renews their discussion of the H-theorem, as it is formulated by Fierz.

Pauli writes on some points of discussion for the forthcoming meeting with Fierz in Basel.

Pauli writes about one of the letters he wrote to Weizsäcker (a copy is attached) concerning the "Bohr-exegis", especially on complementarity, and the "unification of opposites". In connection with this, Pauli explains the story of the Danish order of the elephant, which has been given to Bohr.

Pauli replies to Fierz's letter of the 17 October 1956. He gives further details concerning the discussion of beta-disintegration.

Pauli makes some additions to his previous letter and sends the calculations of certain terms describing the emission e-+ v+ or e+ + v-. An appendix refers to Pauli's paper in the Bohr-Festschrift.

Pauli sends an additional remark about the paper by four Japanese, published in: Progress of theoretical physics: 6 (1951) on the possibiliy of avoiding indefinite metric in Hilbert-space in quantum electrodynamics.

Pauli continues to write about the paper written by four Japanese physicists published in: Progress of theoretical physics: 6 (1951) and on a book by Synge.