Pauli confirms that Corson's visit to Zürich will be agreable. Regarding elementary particles problems Pauli refers Corson to the proceedings of the "Rochester" conference held in Geneva 1958.

Pauli reacts positively to the idea of Fierz's going to CERN. He expresses on the whole a favourable opinion on the work and on the atmosphere in CERN.

Heisenberg encloses a manuscript discussing certain properties of the propagation function of the non-linear wave equation. He asks for Pauli's opinion.

This letter contains the continuation of a former letter of the same day (elsassers_0090). Pauli adds some remarks on entropy and information.

Pauli is positive about Fierz's ideas which seem to be promising for weak coupling.