Pauli is waiting for news concerning Bhabha's possible arrival during this semester. General questions concerning Pauli's trip to India.

Pauli is back from his trip to India. He has written a paper on the Hamiltonian structure of non-local field theories.

The letter contains a short remark on self-energy and a longer one meson-theory, with reference to papers by Schwinger and Oppenheimer.

The letter talks about some results of the application of "substraction-quantumelectrodynamics" to a higher approximation of the Compton-effect.

Pauli recommends his assistant Jost to Bethe. He gives a critical comments on a paper by Dyson about regularization.

Pauli gives additional remarks to a paper by S T Epstein on self-energy. He comments on the physical significance of auxiliary particles. The letter mentions his work on D-factors, appearing in connection with the Lambshift and the magnetic moment of the electron.

Pauli makes a remark on a note by Bethe on self-energy in: Physical review, 55, 681, 1939.

Pauli refers to an introduction by Bernays to a discussion on probability in: Dialectica : 7, no.4, and makes some critical remarks on Bernays's statement at the end of his introduction (p. 321).

Questions in connection with the preparation of a new edition of Pauli's encyclopedia article on relativity.

Pauli agrees to Bergmann's comments on Misner's argument concerning the vanishing of the Hamilton function.