Pauli gives further details concerning his jewish cousin.

Pauli's letter concerns his paper with Fierz on particles with arbitrary spin. He asks Dirac to communicate it to the Royal Society. the paper shows that a consistent theory of such particles in an electromagnetic field is possible.

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 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.

After receiving another letter by Eliezer, Pauli is satisfied that Dirac's "hypothetical world" is mathematically self-consistent, but its physical meaning, i.e. its commection with the actual world,

Pauli makes some comments on a paper sent by Dyson.

Pauli sends some comments and calculations on Dyson's paper on "longitudinal photons".

This letter is Pauli's reply to Dyson's explanation on renormalization.

Pauli gives some details of the paper written by Møller and Stückelberg at the conference in Copenhagen on S-matrix formalism.