Fierz elaborates on physical grounds, for proposed changes in their work, on the H-theorem. He focuses on entropy.

Fierz investigates whether the non-statistical H-curve has the properties demanded by Boltzmann.

Fierz sends a note written by Schiff. He solves a differential field equation.

Fierz writes on Goethe and the blue colour. He makes further remarks on Henry More and Newton and on their rejection of Descartes' mechanistic world picture.

Fierz sends a short addition to his letter of the 1st June 1954, fierz_0016-142r.

Fierz writes about an exhibition on Regiomontanus, his life, his mathematical and metaphysical beliefs.

Fierz disagrees with Pauli's remarks on Fierz's treatment of the ergodic hypothesis.

Fierz writes about the spinor-technique in the group representation theory.

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.