Pauli writes about the Rochester conference in July. He also writes about dispersion relations and theory of elementary particles.He writes about his work with Heisenberg and about the reaction of other physicists to it. He comments on mirror states in the spinor model and on vacuum degeneracy.

Pauli writes about his decision not to publish with Heisenberg. He writes about his discussion with Gürsey, and its contacts with Feynman and Gell-Mann. He comments on a recent talk with Delbrück on evolution.

Pauli discusses a manuscript on the self-energy question that Weisskopf sent him. Pauli considers the question of the absorption terms in the electron spin theory. (With additional notes 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 replies to Weizsäcker's letter about complementarity. He gives his explanation of Bohr's conception.

About a report or speech by E. von Kahler on history. Remarks on the concept of history.

About E. von Kahler's health and discussions concerning biology, especially with Bohr.

About a boat travel and the preparation of a conference in Paris.