Pauli writes about Delbrück's reaction to Bohr's letter on biology and physics. He is against the orthodox belief that classical genetics and chance selection alone can explain biological evolution. Pauli writes about an illustration by J Neumann describing the attitude of orthodox biologists. He writes about Oppenheimer's View.

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

Pauli writes about an error in a manuscript by Heisenberg. He comments on discussions with Pais.

Pauli comments on papers by Wentzel and Fierz published in the Helv. Phys. Acta. He writes about the difficulties of all theories on nuclear forces. He writes about the anisotropy of neutron-proton scattering for higher energies, and its consequences for the theory. He comments on his paper on the Lambda-limiting process. He writes about Dirac's theory of photons with negative energy. He writes about the discovery of a new positive particle.

Pauli writes about the failure to decide mathematically wether the renormalized and Lorentz-invariant quantization of electrodynamics constitutes a consistant theory. He writes about his visits to Hamburg and Copenhagen and to the relativity conference in Berne.

Pauli writes about the magnetic moment with strong coupling in the meson theory. He comments on the two-nucleon problem.

Pauli replies to Wentzel's letter of the 2nd October 1942. He comments on Wentzel's calculations.

Pauli writes about the renormalization method which does not work so well for general interaction in quantized field theory as in the case of positron-quantum electrodynamics.

Pauli writes about possible candidates for an assistantship in his institute. He reports on the New York physics meeting.