Pauli replies to Heisenberg's letter of 27 February. He thinks that understanding between him and Heisenberg may be impossible, because he regards Heisenberg's calculations and interpretation as "wishful thinking". There is a discussion of the parity problem.
Zonder titelPauli makes a comment on Fierz's letter. He writes that equations which cannot be derived from a variation principle must fail in the end, both in the mechanics of points and in classical field theory. He speaks about a book by Jordan and he speculates on the origin of life. Pauli suspects that its first beginnings are non-reproductive phenomena like Jung's "synchronic" phenomena.
Zonder titelHeisenberg makes two remarks on Pauli's questions: 1) about complex eigenvalues of the system N+2$\Theta$, 2) about potentials of forces between elementary particles.
Zonder titelPauli writes on the recent experiments by Gorter and by Frauenfelder. He talks about a theoretical paper by Touschek and suggests to Fierz that he publishes his work on the isomorphism of the Majorana-theory theory.
Zonder titelPauli makes technical arrangements in connection with his impending visit to London. He criticises the title of Salam's paper "Universal Fermi-interaction". He says that theoreticians should never use the word "universal".
Zonder titelPauli makes detailed comments on a paper by Salam which on the whole is regarded by Pauli as an important step forwards.
Zonder titelW. Pauli informs that he has reported in Hamburg (probably at Hamburg University). No mention of the subject.
Zonder titelTouschek gives arguments for conservation of heavy particles based on Eich-invariance.
Zonder titelPauli writes of his travel plans to Copenhagen.
Zonder titelPauli talks about a possibility of meeting Heisenberg at the end of the month. He wants to discuss with him the influence of the finiteness of masses on the form of the potential, the wave-mechanical V-N-scattering problem indefinite metric and the paper and lecture by Nishijima.
Zonder titel