Touschek writes about the results of his elaboration of Fierz's equivalence theorem.

Touschek comments a part of Pauli's lecture in Varenna, which is superscribed "The nucleon magnetic moment in the static theory".

Uhlenbeck responds to Pauli's criticism to his work with Kahn on condensation. He makes comparisons with Born's work.

This letter encloses Hayashi's reprint on non-local theory. Umezawa discusses Galmanelli's result and his immediate goal of a canonical formalism.

Van Hove adds a remark to his letter of 9 August, concerning one of the formulae.

Van Hove has some observations about charge renormalization.

Van Hove gives some calculations on the interaction potential between two nucleons according to the meson theory.

Van Hove comments on two suggestions made by Pauli in his letter of 18 June.

Van Hove talks about Landau's paper on renormalization.