Pauli talks about reasons for writing to Klein and not to Bohr, involvement with Heisenberg in field theory, Heisenberg's "artificial" solution of the commutation problem, difficulty with continuous beta-decay energy, and shortcomings of the field theory.

Pauli writes about his discussion with Miss Meitner on the experiments of Ellis and Wooster on Beta-decay.

Pauli refers briefly in this postcard to a paper written by Fock (in: Z. Phys. : 57 (1929),pp.261), to the "Fernparallelismus" of Einstein in which he does not believe, to a relation made by Fürth connecting radii and masses of electron and proton with c and h.

Pauli writes about the excess of the scattered radiation over the Klein-Nishina formula and its possible interpretation on nuclear effect.

Pauli congratulates Klein on his work, his new position and remarks on physics in Sweden and Klein's work. Pauli describes his attempts to treat beta decay using "neutron" hypothesis. Pauli gives arguments against failure of energy

Pauli writes about a review of Gamow's book, written by Pauli.