Pauli discusses of form-factor theories, especially comparison of the Möller-Kristensen theory with those of Dyson and Schwinger.

Pauli is working on the w-space of Pais. He asks about progress of Heisenberg's work.

Pauli writes in detail about Einstein's arguments against the usual interpretation of quantum mechanics: Einstein is against Bohm and De Broglie, but he believes that the statistical description of quantum mechanics is incomplete. He also writes about Einstein's "realistic metaphysics" and Pauli's attitude towards it.

Pauli hopes to meet Heisenberg in Bern.

Pauli replies to Heisenberg's letter of 19 June.

Pauli replies to Heisenberg's letter of 25 December, especially about field-operators. He writes about his paper for the forthcoming meeting in New York on quantum electrodynamics.

Pauli asks about the character of the conference of Nobel prize winners in Lindeau because possibly he will attend this time. He asks about a symposium in Karlsruhe on the limits of physics.

Pauli comments and questions in connection with Heisenberg's letter of 26 December which Pauli regards as a progress.

Pauli gives some qualifications of his last arguments about the proportion of the S-matrix.