Pauli gives some advice regarding Kronig's work on band spectra. He writes to Kronig that he should use Wigner's group theoretical methods.

Pauli repays a loan.

Pauli writes about intercombination lines, and perturbations between singulet and triplet lines in Hg. He speaks about the formulas for the relative intensities of multipletlines and the problem of resonance radiation.

Pauli hopes that Kronig will accept the post of Pauli's assistant in Zürich.

Pauli writes Kronig that his appointment runs from May 1st until the end of the summer term.

Pauli writes about electron configurations in the elements K to Cu, and about the question of clarification of the hydrogen spectrum and its analogy with a reduced X-ray spectrum.

Pauli makes more remarks about the H-atom and its spectrum.

Pauli clarifies a misunderstanding regarding the use of certain coordinates.

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.