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 reports on the Houtermans case, on the arrest of Russian physicists, and on the conclusion of a joint work with Fierz on the "infrared catastrophe". He has had discussions with Bhabha and Kemmer on cosmic radiation and the "Yukawa theory" of nuclear power. He makes some remarks on the theory of β-decay, the American way of life, and Felix Bloch.

Pauli writes about a discussion with Rabi, and about war physics, and says that he is working on the positron theory.

Pauli says he has attended a physicists' meeting in Philadelphia. He writes about new measurements on the meson shower. Weisskopf is invited to Princeton for three weeks at the end of January. Pauli is doubtful about the work of Havas. He sends messages about Klein and Bohr, and makes some remarks about Delbrück.

Settlement of Weisskopf's travel expenses.

Pauli replies to Weisskopf's letter of the 22nd December 1957. He writes about his scientific correspondence with Heisenberg, and his own suggestion for a extension of the Lee-model. He writes about the possibility of two sorts of neutrinos. He writes about lepton charge and its conservation and about parity violation.

Pauli writes about his dissociation from the Damm-Dancoff method. He writes about the mirror problem. He comments on publicity given to Heisenberg's work.

Pauli says that Dirac has criticized Weisskopf's work on the self-energy problem. Pauli says he is working on his Solvay report on elementary particle physics, and makes some remarks about the war. Pauli is looking for a successor to his assistant Fierz, who is going to Basel. He hopes to persuade Jauch.