Jordan replies to Pauli's questions as regards Jordan's cosmology with a changing gravitational constant. He believes that it is difficult to separate macro-physical and micro-physical considerations in his theory.

Jordan writes about a forthcoming talk by Pauli in Hamburg.

Jordan replies to Pauli's letter of the 1 October 1952 about the relation of Jordan's "projective" cosmology to that of Kaluza. He writes about possible empirical confirmations of the hypothesis of a changing gravitational constant.

Jordan replies to Pauli's two letters. He agrees about the necessity for clarification of the physical significance of his formulae but he has some reservations as regards Pauli's criticism.