Pauli writes about a report from the USA by Jost that Bogoljubow has advanced more than anybody else in the mathematics of dispersion relations.

Pauli replies to Fierz's letter of the 17 October 1956. He gives further details concerning the discussion of beta-disintegration.

Pauli makes some additions to his previous letter and sends the calculations of certain terms describing the emission e-+ v+ or e+ + v-. An appendix refers to Pauli's paper in the Bohr-Festschrift.

Pauli suggests to make a joint colloquium talk on a paper by Ramsey on "Negative temperatures".

Pauli sends an additional remark about the paper by four Japanese, published in: Progress of theoretical physics: 6 (1951) on the possibiliy of avoiding indefinite metric in Hilbert-space in quantum electrodynamics.