Bohr thanks Pauli for his beautiful paper. He wants to refer to it in a note.

Bohr discusses the "Gospel of the magnetic electron". He writes that Kramers has confirmed Pauli and Heisenberg's calculations. Bohr is still hoping for a correspondence agreement. Kramers made a guess as to the relativistic and magnetic corrections, the relevant formulae are given in the letter.

The letter encloses a paper by Jordan published in: Z. Phys. : 44 (1927), pp.473. Bohr discusses it briefly and refers also to Klein's work. Bohr has not yet finished a "small note". He refers to Pauli's visit.

Bohr has sent proofs from Holland to Berlin for "Naturwissenschaften : 16 (1928), pp.245" but he is still expecting his last proofs. He hopes to see Pauli in Copenhagen. He has enjoyed seeing Kramers and Ehrenfest in Leiden. He is preparing his opposition to Jacobsen's thesis. Klein is still in Cambridge.

Bohr encloses his paper for "Naturwissenschaften :16 (1928), pp.245" and expresses his gratitude for Pauli's help.