Pauli has been in Princeton since the 24th February and he is making some inquiries on Bhabha's plans. He says that in Princeton the meson theory with particles in 1/2 speed is in vogue. He heard some contradictory news on Bohr.

Pauli writes mostly on personal matters.

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

Pauli writes about the impossibility of his returning to Switzerland during the war. He writes about new experiments with cosmic rays and about nuclear forces.

Pauli's letter deals with Dirac's new formulation of quantum electrodynamics. He objects to the fact that Einstein's radiation laws are not derived but introduced as additional assumptions and refers to

Pauli hopes to be able to read Bhabha's cascade theory in Proceedings from the Indian Academy. He expresses his agreement with some of Bhabha's statement, but disagrees with his criticism of Christy and Kusaka. He makes general remarks on the relation between Bhabha's classical theory of 1941 and the Pauli and Dancoff theory. He has read with a great interest Dirac's new work (Proc. Roy. Soc. March 1942). He speaks about the two letters he has exchanged with him.

Pauli makes some new remarks on Dirac's theory on the occasion of sending him a copy of Pauli's paper on Dirac's method of field-quantization.

Pauli expresses his interest in some results of Dirac's pupil Eliezer and he makes some critical comments on his paper.

Errors in a work of Wilson, on which Chakrabarty's research is founded invalidate Chakrabarty's conclusions. Pauli has returned to work at Princeton from his summer estate and asks Bhabha to write to him often as he is becoming isolated.