Pauli hopes to get Bohr's new manuscript. He talks about the use of half-integer K-values for a description of penetrating electron orbits. He doubts that these methods could lead to a real explanation of the atomic structure.

Heisenberg writes about Einstein's objections to Bohr's radiation theory and Born's comments on Kramer's dispersion formula.

Heisenberg writes about the intensity rules of Ornstein as correspondence of the correspondence principle.

Pauli writes against Bohr, Kramers and Slater's paper. He mentions his talk with Einstein about the paper and gives Einstein's main arguments against it, in particular his belief in the strict validity of energy-momentum conservation for elementary processes. Pauli gives his own arguments against Bohr's assumption.

Pauli gives consideration to a theoretical treatment of the Zeeman effect which includes relativistic terms.

Pauli writes about the g-values of neutral and ionized atoms.

Pauli sends Bohr a manuscript of an unpublished work. He writes about his new interest in quantum theory and his idea to explain the anomalous Zeeman-effect through relativistic considerations. His hypothesis is that the doublet-structure of alkali spectra is alone a property of the valency-electron. He talks about the necessity for a correct formulation of the correspondence principle for atoms with more than one electron and about the necessity for a modification of the classical kinematic concept of motion.

Heisenberg writes about Pauli's latest work and congratulates Pauli for all the "lies" contained in it.

Pauli expresses his doubts about the validity of his exclusion-principle in more complicated cases. He wants to discuss it in Tübingen on Jan. 9 1925.

Pauli thanks Bohr for the days he spent in Copenhagen.