Pauli replies to Weisskopf's letter. He asks why the cut-off radii of the proton and the neutron are exactly equal. He makes remarks on the quantum theory of fields, and Landau's contribution to this problem. He writes about Schindewolf's book on evolution recommended to him by Weisskopf.

Pauli asks if Walden has more information on his claim that Mendeleev discovered the periodic table through dreams.

Pauli comments on Weizsäcker's article on Goethe's science. He writes about Goethe and alchemy, and he writes about intuitive type and mental type, and about mind, matter and psyche.

Pauli replies to Weizsäcker's letter. He comments on Plato and neoplatonism. He writes about the problem of unity of being in alchemy. He suggests showing this letter to Heisenberg.

Pauli writes about his trip to Princeton. He makes remarks on H-theorem and quantum statistics.

Pauli writes about CERN's project. He comments on papers on the "casual interpretation" of quantum mechanics, particularly by Bohm.

Pauli refers to questions regarding the equivalence of pseudovector coupling.

Pauli talkes about some calculations on classical diffraction theory in reference to Sommerfeld's work.

Pauli writes the decision to postpone Zürich physics congress.