Scientific Paper no. 1a -- On the splitting of the Roentgen and optical terms caused by the electron rotation and on the intensity of the cesium lines -- Scientific Paper no. 1b -- Majorana dr Ettore: Search for a general expression of Rydberg corrections, valid for neutral atoms or positive ions -- Scientific Paper no. 2 -- On the formation of molecular helium ion -- Scientific Paper no. 3 -- On the possible anomalous terms of helium -- Scientific Paper no. 4 -- Pseudopolar reaction of hydrogen atoms -- Scientific Paper no. 5 -- Theory of the incomplete P? triplets -- Scientific Paper no. 6 -- Oriented atoms in a variable magnetic field -- Scientific Paper no. 7 -- Relativistic theory of particles with arbitrary intrinsic angular momentum -- Scientific Paper no. 8 -- On nuclear theory -- Scientific Paper no. 9 -- A symmetric theory of electrons and positrons -- Scientific Paper no. 10 -- The value of statistical laws in physics and social sciences -- The Inaugural Lecture -- Preliminary notes for the inaugural lecture.