Michel makes an amendment to his previous letter of 22-12-54.

Pauli asks questions concerning the thermodynamics of supraconductivity and about a letter by Dyson.

Pauli encloses a copy of the manuscript of his lecture in Mainz, and asks for comments.

Pauli makes some remarks on a letter written to Göttingen on field quantization.

Kröner's reply to Pauli's letter of 5 Feb. He speaks about the classification of cognition in Plato. He makes some remarks on Leibniz's philosophy and scholasticism.

Pauli offers more criticsms of Klein's Bohr-Festschrift article.