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Pauli refers briefly in this postcard to a paper written by Fock (in: Z. Phys. : 57 (1929),pp.261), to the "Fernparallelismus" of Einstein in which he does not believe, to a relation made by Fürth connecting radii and masses of electron and proton with c and h.

Pauli announces his visit in Leiden and asks Ehrenfest to read his last paper on the H-theorem in order to discuss it with him.

Pauli reports on Lise Meitner's criticism of the Ellis-Wooster measurement of beta spectrum.

Pauli invites Ehrenfest to lecture on X-ray physics in a meeting in Zürich. He refers to the Ellis-Wooster heat experiment.

Pauli gives some personal evaluations of Oppenheimer and Bloch. He also comments on Rutgers and his progress with quantum electrodynamics.

Pauli discusses the question of the width of the zero-order spectrum of a refracted electron beam. He suggests that Kramers should calculate it for gases or liquids.

Pauli gives some second thoughts on a discussion, which took place the day before, between Einstein and Pauli on tensors possessing certain symmetry properties.

Pauli thanks Einstein for the proofs of his paper (written by Einstein with Ehrenfest) concerning the elementary processes in which several quanta are simultaneously absorbed or emitted. Pauli shows that there exists an analogue for such processes in classical theory.

Pauli thanks Einstein for the proofs of his paper on "Fernparallellismus". Pauli remarks that from the viewpoint of quantum theory nothing can be said in favour of this new concept. He further criticizes the derivation of Einstein's field equations and their results which have lost contact with physical reality. He is ready to bet that in a year Einstein will drop the whole "Fernparallelismus".

Pauli thanks Einstein for the proofs of the paper he has written with Mayer and he expreses the greatest doubts as to the physical valididity of its basic idea, to describe two particles with different masses by a wave-function in an ordinary space-time continuum.