Bloch has given Pauli Bohr's letter and the note on the nuclear photo-effect to read. At Bohr's request, Pauli gives his opinion on it.

Pauli has just heard that the second proofs of Bohr's "Dialectica" article have been sent to Bohr. They have to be final and he asks him to return them promptly to the editor. In reading the proofs Pauli noticed a slight error in the German translation of the summary and asks Bohr to correct this. Bohr's article is now excellent. The next time he hopes to write to Bohr about physics again.

This is the last letter from the year 1948, written by Pauli just before going home for a New Year's dinner. Pauli is glad to report that he received the issue of "Dialectica" containing Bohr's article. Unfortunately he cannot say anything on the question of the reproduction rights. He has written to the editor again and hopes that Bohr will soon hear something. Pauli was very glad of the "hopeful spirit" of Bohr's letter. He is very interested in the publication of Bohr's old manuscripts, especially the paper with Rosenfeld on the charge measurements. He also thanks him for the copy of the "penetration" paper. He has had no time yet to look at it, because he was working on the new subtractive electrodynamics. He received a paper by Schwinger on self energy and polarisation of the vacuum. He is a master in concealing physical difficulties with mathematical elegance.

Pauli thanks Bohr for his letter of December, and informs him of the invitation to Oppenheimer to come to Zurich and give some lectures. Pauli says he will probably come to Copenhagen for a conference 6-10 July, and mentions his exchange of letters about physics with Dyson.

Full text: "Konferenz in erster April Haelfte passt ausgezeichnet Vorlesungsbeginn Zürich 20 April = Pauli" (conference in the first half of April suits perfectly lecture beginning Zürich 20 April = Pauli)

This letter is Pauli's reply to Bohm's letter of the second november 1951. He explains the necessity for the linearity of the Schrödinger-equation, and objects to an introduction of a direct coupling between the psi-function and Bohm's hidden parameters.

Comments and calculations on a lemma by Stückelberg related to statistical mechanics.

Remarks on the classical H-theorem on critical recapitualtion of ch. VII, 79-82 of Boltzmann's "Vorlesung über Gastheorie", vol. II.

Pauli thanks Bhabha for his letter of the 26th March. He gives developments about meson and proton dispersion and comments on Bethe's latest work on meson theory and nuclear power and also his interpretation based on Fierz's study of Blau and Wambacher's results. Pauli sees a solution in new particles that have been observed in cosmic radiation. Heitlers theory seems to be unsatisfying. Pauli is working on a theory on high speed particles. He adds some remarks on the war and some physicists.

Pauli writes that there could be some possibilities of a position in the USA for Bhabha. He is publishing his Solvay report of 1939 in the Rev. Mod. Phys. Observations on Christy and Kusaka's calculations on the development of the shower and the pseudo scalar meson theory.