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Fierz discusses the question of which representations of the homogeneous group can be contained in the inhomogeneous Lorentz group.

Fierz' letter concerns the interpretation of a passage in the Timaios. He quotes the passage in Ficino's Latin translation.

Fierz is against the conception that the origins of life are due to a "chance". He agrees with Pauli that one can expect to find spherical gravitational waves.

Fierz sends some additions to his letter of the 29th September 1954 (fierz_0016-15r).

A sketch of a statistical theory of a dust particle.

Fierz makes a detailed critical analysis of Weizsäcker's paper in "Die Naturwissenschaft". He rejects in particular Weizsäcker's suggestion of a modified logic for the explanation of the dualism wave-particle.

Fierz writes of his talk with Bohr about Weizsäcker's 'quantum-logic" and of Bohr's rejection of it.

Fierz makes some remarks about the $\beta$-decay and the properties of the neutrino and the anti-neutrino.

Fierz comments on two papers by Huang, Yangr and Luttinger on the statistics of rigid spheres.

Fierz writes about a note by Kusaka, published in: Physical review: 60 (1941) 61, regarding the theory of the neutrino with spin 3/2.