Pauli thanks Kronig for his letter about the two different sound waves in He II, which exists at different frequencies.

The trip to India is planed for November. Pauli proposes to talk about field quantization and to hold a seminar on open problems in theoretical physics. Pauli hopes to see a presentation by Salam on his work on meson theory. Pauli invites Bhabha for a visit to Zürich during his Europe trip.

Pauli agrees with Källén about an error in Thirring's paper. The question now is whether Hurst's paper is correct.

Pauli encountered some difficulties in obtaining his visa from the Indian embassy of Bern.

Pauli discusses a second letter by Fierz on the entropy of a system which is not in equilibrium.

Pauli writes on matters concerning his trip to India. He hopes to meet Bhabha in Bombay.

Immediately after his return from India, Pauli gives his impressions.