The letter gives an answer to Pauli's questions, particularly on the relation of his transformation group to the assumption of closed geodesics. Bergmann discusses possible consequences if one doesn't assume this.

About the English translation of W. Pauli's essay 'Der Einfluss archetypischer Vorstellungen auf die Bildung Naturwissenschaftlicher Theorien bei Kepler': search for a translator and publication term.

About the English translation of W. Pauli's essay 'Der Einfluss archetypischer Vorstellungen auf die Bildung Naturwissenschaftlicher Theorien bei Kepler'. V. Gillmor informs that W. McGuire is responsible for the copy-editing and preparation of the manuscript for the press.

Gürsey writes of his own calculations in connection with Heisenberg's unitary theory.

Gürsey gives an outline of his attemps at constructing a field theory from the symmetry properties of the known particles.

Gürsey replies to some points in Pauli's last letter on the Langrangian, on the quantum numbers and on the mirror problem. particles.

Gürsey replies to Pauli's letter of the 17 February 1958, especially about quantum number assignments for fermions and bosons.

Gürsey replies to Pauli's letter of the 18 February 1958 with reference to Schwinger's paper. He thanks Pauli for his invitation to come to Zürich in 1959. He gives some details about his stay in the U.S.A.

Gürsey replies to three letters by Pauli of the 26, 27 February and the 1 March 1958. He writes on the quantum numbers Q, N, L, on Källén's objection to the spinor-theory, on antiparticles in the one-vacuum treatment, on the miror problem, on his own mistakes in his last letter and on the meaning of certain operators.

Kaufman discusses properties of a determinant and invariance of his Lagrangian and he answers a question from Pauli.