Pauli asks a question about a possible visit to Edinburgh. He makes some remarks on various papers which appeared recently.

The letter contains more remarks on the same model.

Pauli aknowledges receipt of Kemmer's manuscript. He asks him to look into the latest American papers on nuclear forces.

Pauli makes some remarks on the present state of the meson-theory. He writes about measurements of energy density, charge density and particle density. Ha also makes some personal reports on common colleagues.

The letter asks further question about the same model discussed in his letter of 14 Nov, concerning impact cross-section of suchparticles.

The letter gives a short evaluation of the political situation, in connection with Kemmer's doubts about England. He replies to some physics points raised by Kemmer.

Pauli asks questions about the algebraic properties of certain relations and makes some remarks about spin operator.

The letter contains detailed discussions of systems of hyper-complex numbers

Addition to the former letter.

Pauli wants to continue his work with Kemmer on systems of hyper-complex numbers. He asks questions about application of quantum theory (perturbation) and on scattering of neutral mesons.