Pauli is against the interpretation given by Princeton physicists to certain Beta-decay experiments and against the two-component theory.

Pauli refers to Preston's paper in the Canadian Journal of Physics which supports Pauli's criticism expressed in the last letter.

Pauli expresses doubts as to the correctness of the two-component theory.

Pauli replies to an invitation to come to Urbana.

Pauli mentions his recent experiments in Heidelberg von Stek about polarization of Beta-electrons of RaE.

Pauli writes about von Steck's results in Heidelberg.

Pauli replies to Fokker's question and thinks it worthwhile to prepare an edition of Ehrenfest's collected work.

Pauli asks some questions concerning the relation of a paper by Majorana (published in: Nuovo Cimento: 1932) to Pauli and Fierz's theory about particles of arbitrary spin.

Pauli writes about his arrival at Princeton. He gives more details about his calculations regarding Majorana's equations.

Pauli comments a letter from Fierz regarding the unitary representations of the Lorentz group.