Bohr is convinced of the significance of Thomas' paper in : "Nature : 117 (1926), pp. 514" and asks for a reply to his questions before reading the proofs of Thomas' paper. He also hopes to see Pauli in Copenhagen in April.
Sans titrePauli admits that his objections against Thomas' Theory of fine-structure are not valid, (i.e. that thte concept of spin has to be accepted).
Sans titrePauli writes about his calculations of the Balmerline intensities with the help of Schrödinger's calculus.
Sans titreSommerfeld expresses his admiration over Pauli's "Handbuch-article on Quanta". He says that Schrödinger's wave mechanics does not yet solve the riddle of quanta.
Sans titreHeisenberg replies to Pauli's letter. He fully agrees with Pauli's considerations regarding impact processes, which clarify the physical meaning of Born's formalism. He talks about the physical reality of Pauli's p-waves and the indeterminacy relations. Space and time can be applied only to many particles, like temperature and pressure in a gas. He writes about the meaning of the matrix-elements and on the concept of fluctuation of electrical density.
Sans titreEhrenfest discusses in a joking language the results of some of his investigations in the light of Pauli's exclusion principle.
Sans titreHeisenberg sends Pauli his manuscript, on the whole identical with his long letter. He writes about the postulate character of his quantum mechanical assumption and its similarity with the assumption of the constancy of light velocity.
Sans titreHeisenberg writes on the difficulties of the phase problem in radiation theory, and on a Hund's paradoxon about optically left- and right-rotating substances and its solution.
Sans titreHeisenberg writes about Pauli's suggestions for the quantum-theoretical relations between electrical and magnetic field strengths. He writes also about Pauli's criticism of Dirac's paper and discussions with Bohr about his thought experiments.
Sans titreHeisenberg writes about his discussions with Bohr on the "$\Gamma$-ray-microscope". He makes some remarks on Pauli's electrodynamical considerations, on the Hamiltonian interaction function between radiation and matter and on a paper by Darwin about Heisenberg's and Jordan's formulae.
Sans titre