Pauli replies to Schafroth's letter. He talks about his results about an ideal gas of charged bosons. He makes a short comments on supra-conductivity, resonance-methods and about papers by Butler, Friedmann and Feynman.

Pauli replies to Schafroth's letter of the 9th December 1954. He makes some "pedagogical" advice about contacts with colleagues. He makes critical comments on Schafroth's paper on "supra-conductivity of a charged ideal Bose-gas". He talks about a physical error in this paper.He agrees with Schafroth that the Bose-gas should be given more attention.

Pauli talks about Schafroth's paper which interests him. He talks about his seminar on Pais' w-space.

Pauli talks about Fröhlich's reaction to Schafroth's paper. He comments on Feynman's paper.

Pauli talks about Felix Bloch's interest in Schafroth's work on the ideal Bose-gas. He talks about his study on Lee's paper (in: Phys. Rev. : 95 (1954), pp.1329).

Pauli makes a letter of recommandation for the appointment of Schafroth as reader in Sydney.

Pauli asks a question about the paper of Yang and Mills (in: Phys. Rev. : 96 (1954), pp.191). Have their B-particles exactly zero rest mass or not?

Pauli thanks Salam for his "universal" paper.

Pauli talks about his trip to London. He makes more remarks on Salam's paper.

Pauli asks questions about the non-occurence of $\pi \to e+v$ and $\pi e+v+photon$. He talks about Heisenberg's work and his idea that the real world results from a bi-section of a $\gamma$-invariant world, for non-zero rest mass and for the neutrino a leptonic charge.