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Fierz sends this letter as an addition to his remark on the orthogonal group (fierz_0016-1355r).

Fierz continues to write of his letters of the 1st and the 2nd May 1954 on the Lorentz-transformation.

Pauli talks about Källén's curriculum vitae in connection with a vacancy for a proffessorship.

Pauli writes about the planned Bohr Festschrift. He makes some remarks about Bohr's attempt to create a kind of a religion of complementarity as in former times one has made "energetics" into a sort of "world religion". But the basis of physics is too narrow for such attempts. One should resist the natural impulse which grows with age, to bring everything under one roof.

Fierz comments on a paper by Bargmann and Wigner, and some calculations as regads the quantization of the Wigner theory published in: Zeitschrift für Physik (1948), 124, 665.

Concerns biology, evolution, and concepts relating to wholeness, and to the observer.

Touschek writes about Pais paper published in Physica. He writes about his own work on time-reversal.

Fierz gives the conclusions of his letters about the Lorentz group and makes general observations about the problem.