Pauli sends some comments and calculations on the representations of the Lorentz group to the work of Fierz and of Gelfant.

Pauli describes his role in preparation of the Bohr Festschrift. Pauli gives his views on biological questions.

Pauli replies to Schafroth's letter. He talks about his results about an ideal gas of charged bosons. He makes a short comments on supra-conductivity, resonance-methods and about papers by Butler, Friedmann and Feynman.

Pauli refers to the ideas of G D Wassermann on "mental patterns", which are similar to Jung's archetypes. He believes in a wider significance of the concept of archetype which may help undestanding ESP and its connection with evolution. He asks a specific question regarding ESP experiments.

Pauli doubts some of Källén's formulae for the Lee model. He writes about calculations of convergence of integrals and about the proof for the consistency of Peierl's method.