Heisenberg writes about the problem of continuous spectra from the point of view of quantum mechanics. The effect of time dependent external forces on the atom, and Jordan's calculations of the statistical behaviour of proper vibration of a membrane according to the new theory.

Heisenberg writes about the compatibility of Goudsmit's hypothesis with the formalism of Heisenberg.

Heisenberg writes about the paper of Born and Wiener, and on cyclical variables.

Heisenberg writes about cyclical variables and the consequences for Goudsmit's hypothesis.

Heisenberg replies to objections from Pauli regarding his work on quantum electrodynamics, in particular in connection with the S-matrix.

Heisenberg talks about the arguments of his collaborators against his axiomatics.

Heisenberg asks about the formulation of the difference between $\Psi$* and $\Psi$+ in the Dirac theory, with reference to the operator $\eta$.

Heisenberg agrees with Pauli that one cannot make the S-matrix alone a starting point of a quantized field theory. There is discussion of other possible presuppositions.

Heisenberg talks about the meeting of the Nobel prize winners in Lindeau. He writes about progress in his model theory.

Heisenberg has found that as regards the N + 0 - problem the Lee model deviates considerably from reality.