Pauli replies to Pais' letter about W-space. He talks about the connection of Pais' theory with those of Kaluza and Klein. He writes about the geometrization of meson-nucleon forces.

Pauli thanks de Broglie for sending him his paper "La physique quantique restera-t-elle indéterministe ?" Pauli makes some critical comments on it.

Pauli writes on additional calculations about Jordan's theory of gravitational constant.

Pauli gives some details about the confor-transformations in Jordan's field equations.

Pauli writes about his travel plans to Les Houches.

Pauli makes some remarks on Fierz's work on the H-theorem.