Pauli would like to make plans for his and his wife's visit in Copenhagen. He is going to participate to a conference in Lund on June 30th.

Pauli suggests a topic for his Lund lectures.

Pauli comments on Weizsäcker's article on Goethe's science. He writes about Goethe and alchemy, and he writes about intuitive type and mental type, and about mind, matter and psyche.

Pauli replies to Lüders' letter of 30 June. He makes remarks about anticommutation of different spinor fields.

Pauli thanks Gagnebin for his letter on Lamarck. He expresses doubts on the significance of the concept of selection for the explanation of biological evolution. There exists no theoretical model for the assessment of the time scale evolution.

Pauli writes about the contents of his article on "Phenomenon and reality" and discusses again the problem of the relation between observer and observed object. He speculates on the possibility that in organic matter, i.e. life, there may exist an influence of the act of observation on the observer, which often could be of a negative, undesirable nature.

Pauli writes on Schopenhauer's philosophy and the analogy of his "will" to Jung's unconscious.