This letter gives the results of Blokhintzev's calculations on the wave equation of a field interacting with heavy particles.

The letter talks about the "sudden death of parity" in Wu's experiments, problems with nucleon-force data for deuterons and travel plans to Copenhagen, Zürich and Sydney.

This is a reply to a letter from Pauli and to Schafroth's criticism of 18 February, as regards his "Critic of the relavistic thermodynamics".

Bethe talks about mathematical difficulties in his calculations (maybe on the scattering of light).

Further discussion of a difficult integration connected with the physical problem Bethe is dealing with.

Reconstructs 1941 argument relating curvature vector to gradient of a scalar field. Bergmann expresses "suspicion" about the existence of unique vector field and coordinate system. Appendix 1: 2 typed pages by Bergmann. Appendix 2: of calculations by Pauli.

The letter gives an answer to Pauli's questions, particularly on the relation of his transformation group to the assumption of closed geodesics. Bergmann discusses possible consequences if one doesn't assume this.

Bender talks about Tornier's reply to Pauli's remarks and sends a copy to Pauli.

Bender comments on Pauli's letters and their consequences for Tornier's ideas.

The letter contains remarks in connection with a manuscript by Mr. Tornier about Bridgeman's objections to a statistical inquiry into ESP.