Pauli acknowledges receipt of Uhlenbeck's paper. He writes about the contribution of Dutch colleagues to the Bohr-Festschrift.

Pauli comments on the meson theory with integer spin and strong coupling. He writes about Schwinger's approach to the problem. He writes about nuclear forces and about the competition between the nucleon's interaction energy and the energy of isobars. He writes about pair theory. He comments on a correspondence with Dirac about the elimination of divergences in quantum electrodynamics.