Heisenberg comments on Bloch-Nordsieck's paper. It would be worthwhile to calculate the end of the spectrum. From papers by Anderson, Neddermayer and Blackett it seems to follow that particles exist with masses intermediate between electron and proton, and this is a plausible result. On Cosmic radiation, he says that very great showerscannot be explained by the Bhabha-Heitler formula alone.
Heisenberg, WernerHeisenberg hopes that "Nature" will reply to Stark's article. He talks about the possible reasons for the asymmetry of Beta-ray-spectra.
Heisenberg, WernerHeisenberg replies to Pauli and Källén, in particular about "Hilbert-space II". He makes some remarks on the physical contents of his mathematical formalism.
Heisenberg, WernerHeisenberg writes about the importance of his function $\chi$a(xx') for his quantized field theory.
Heisenberg, WernerHeisenberg replies to Pauli's question as regards the "Hilbert-space II" formalism, and the commutation relations on the light-cone. He also speculates about the importance of e$^{2}$/h.c.
Heisenberg, WernerHeisenberg attempts to justify his axiomatics and to show that it is less arbitrary than suspected by Pauli.
Heisenberg, WernerHeisenberg replies to a question by Pauli concerning certain equations in his last letter.
Heisenberg, WernerHeisenberg talks about a paper by himself and Ascoli on the fine-structure constant. He comments on a paper by Källén and Glaser in which the V-particle of the Lee-model becomes radioactive, disintegrating into N and $\Theta$.
Heisenberg, WernerHeisenberg talks about his recent results giving tentative proof that in all sectors of the Lee model with dipole ghost the S -matrix is unitary.
Heisenberg, WernerHeisenberg writes on clarification of the question of the existence of a solution for the integral equation containing a simple pole. He gives his opinion on Källén's calculations.
Heisenberg, Werner