Pauli talks about the offers made to Felix Bloch for a post in Göttingen. He urges Bohr to publish his considerations on the spin of the electron.

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

Pauli comments on a paper by Weyl published in the April issue of Proc. Nat. Acad. Sci. He writes about Lagrange's function. He writes about quantization of field equations. He asks Weyl about his future plans.

Pauli discusses matrix representation of Maxwell's equations, relation of Heisenberg-Pauli to Dirac theory, problem of self energy. He opposes Dirac's interpretation of negative states and Bohr's views on continuous beta spectrum.

Pauli awaits experiments on beta-decay "neutron" hypothesis. Pauli asks for an answer from Bohr to Pauli's arguments against failure of energy conservation in his letter of 12 Dec.

Pauli suggests a meeting in Chicago.

Pauli telsls of a possible assistantship for Delbrück. He also writes about the neutron.

Pauli thinks that his new formulation of quantum electrodynamics represents a progress, although he agrees with Dirac that a greater symmetry between space-variables and time-variables seems desirable.

Pauli writes that he will not come to Debye's conference in Leipzig. He explains the meaning of some sentences in his Handbuch-article, especially those related to discontinuity created by observation. He explains what he means by second quantization. He asks Heisenberg's view on the uncertainity relations for field strengths.

Pauli sends copies of two papers with Casimir on scattering of Gamma-rays by bound electrons. He says that he believes again in the validity of the energy law in the case of Beta-disintegration, because very penetrative particles are emitted in this process.