Pauli talks about his decision to go to Hamburg. He writes about the difficulties of Bohr's theory of the periodic system. He makes observations about equivalent electron orbits. He says that there is a failure in classical mechanics. He comments on the introduction of half-integer values for j and m. He talks about his own work on the anomalious Zeeman-effect and about Heisenberg's theory of doublets.

Pauli wants to see Landé's manuscript. He also talks about the displacement of terms in strong fields.

Pauli thanks Landé for sending him the proofs of his paper. He comments on several points. He talks about the binding of the electrons in the He-atom.

Pauli writes about the significance of the quantum numbers.

Pauli talks about a model for the explanation of the Zeeman-effect.