Pauli replies to Weisskopf's letter. He asks why the cut-off radii of the proton and the neutron are exactly equal. He makes remarks on the quantum theory of fields, and Landau's contribution to this problem. He writes about Schindewolf's book on evolution recommended to him by Weisskopf.

Pauli reports on the reaction to the first experimental results on parity violation.

Pauli comments on Heisenberg's relation with the press. He writes about his work with Heisenberg.

Pauli asks some organizational questions in connection with the CERN conference. He writes about Weisskopf's visit to Israel.

Pauli enumerates papers which arrived for the CERN conference. He makes some psychological remarks on Delbrück's attitude to the discussion on evolution.

Pauli writes further about biology. He believes, like Bohr, in a logical possibility of biological laws, which aren't contained in today's quantum physics.

Pauli makes remarks about a disscussion of the Lee model. He writes about the problem of evolution.

Pauli writes about further thoughts on biological questions. He writes about a book by Rensch on evolution, which has impressed him very much. He writes about psycho-physics parallelism, and about a book by Soal and Bateman on modern experiments in telepathy.

Pauli writes about Gorter's preprint on 58 co-experiments and about a note by Salam.