Pauli writes again about a paper by Pauis. He writes on an essay by Panofsky on the Renaissance and the relation of art and science.

Pauli suggests a dissertation on H-theorem in quantum statistics and he summarizes Fierz latest work on it.

Pauli writes on pairs of opposites in music and on the origins of $\varepsilon

Pauli writes about a letter by W Scherrer asking for recommendation of a paper of his for publication in the Helvetica physica acta.

Pauli has returned from the USA and he plans to consider Janner's work.