Pauli writes about longitudinal photons. The principle of "renormalization" of charge and mass works satisfactorily only in special interactions. Another question: will it be necessary to modify the space-time concept for small dimensions?

Pauli sends the copy of a letter from Pauli to Paul T Matthews (dyson_0065-1). The letter shows that Pauli regardsthe electrodynamics of charged scalar mesons as solved.

Pauli writes to Fierz on a paper written by Yukawa, on a suggestion made by Fierz in this connection, on the present difficulties of quantized field theories and on his discussion with Panofsky in Princeton about Kepler and Fludd.

Pauli writes about Jordan's request to send Thellung a lecture by Pauli on problems of the theory of relativity. He writes about Feynman's paper and about Watson's paper.

Pauli writes further about biology. He believes, like Bohr, in a logical possibility of biological laws, which aren't contained in today's quantum physics.

Pauli is looking forward to reading Jauch's forthcoming book on electrodynamics. He would prefer not to read the book in the proof-state, for this means a certain responsibility.

Pauli writes about Jordan's article in the Bohrfestchrift which deals with the role of chance in biology. Pauli criticizes the use of the concept of chance in biology and evolution in particular.

Pauli makes remarks about a disscussion of the Lee model. He writes about the problem of evolution.