Lanczos thanks Pauli for his reply to his letter of 27 Nov, which clarifies the point in question.

Lanczos refers to Pauli's paper (in: Phys. Z. : 20 (1919), pp.457), with a special reference to the quadratic invariants of curvature. He asks about the clarification of the identity (B), p.460 l.c.

Schrödinger asks some questions about the mathematics of nuclear theory.

Schrödinger congratulates Pauli to his move to Princeton. He talks about the Dublin Institute for Advanced Studies.