Fierz makes several comments on a letter of Pauli about the woman in Eckhart's mysticism, and on space, its geometrization and spiritualization.

Fierz sends further remarks about the possible interpretation of Pauli's dream and on the ambivalent attitude of the physicists towards reality.

Fierz sends various remarks on a letter by Pauli.

Fierz sends some considerations about elementary processes and their connections.

Fierz comments on a paper by Stückelberg on the radiation theory of photons and similar considerations made earlier by Fierz.

Fierz writes of his correspondence with Yang about the latter's paper on a gas of rigid spheres. He also writes of his talk with Villars on the latter's work on collective coordinates.

Fierz continues his last letter of the 6 February 1957 about the two component theory of the neutrino. In the absence of forces this theory exhibits mirror invariance.

Fierz makes comments on a paper by Salam which was sent to Fierz by Pauli.

Fierz writes on the theoretical interpretation of certain Beta+ - disintegration experiments.

Fierz writes on interactions leading to a violation of parity.