chapter 23 1 On Rayleigh's Pendulum -- chapter 26 1 On Schro�dinger's wave mechanics -- chapter 26 -2 On the invariant form of the wave equation and of the equations of motion for a charged massive point -- chapter 28 -1 A comment on quantization of the harmonic oscillator in a magnetic eld -- chapter 28 -2 On the relation between the integrals of the quantum mechanical equations of motion and the Schro�dinger wave equation -- chapter 28 3* Generalization and solution of the Dirac statistical equation -- chapter 28 4 Proof of the Adiabatic Theorem -- chapter 29 1 On Improper Functions in Quantum Mechanics -- chapter 29 -2 On the notion of velocity in the Dirac theory of the electron -- chapter 29 3 On the Dirac Equations in General Relativity -- chapter 29 4 Dirac Wave Equation and Riemann Geometry -- chapter 30 1 A Comment on the Virial Relation -- chapter 30 -2 An approximate method for solving the quantum many-body problem -- chapter 30 -3 Application of the generalized Hartree method to the sodium atom -- chapter 30 4 New uncertainty properties of the electromagnetic eld -- chapter 30 5 The Mechanics of Photons -- chapter 32 1 A Comment on the Virial Relation in Classical Mechanics -- chapter 32 2* Con?guration space and second quantization -- chapter 32 3* On Dirac's quantum electrodynamics -- chapter 32 -4* On quantization of electro-magnetic waves and interaction of charges in Dirac theory -- chapter 32 5* On quantum electrodynamics -- chapter 33 1* On the theory of positrons -- chapter 33 2 On Quantum Exchange Energy -- chapter 34 -1 On the numerical solution of generalized equations of the self-consistent eld -- chapter 34 -2 An approximate representation of the wave functions of penetrating orbits -- chapter 34 3* On quantum electrodynamics -- chapter 35 1 Hydrogen Atom and Non-Euclidean Geometry -- chapter 35 2 Extremal Problems in Quantum Theory -- chapter 36 -1 The fundamental significance of approximate methods in theoretical physics -- chapter 37 1* The method of functionals in quantum electrodynamics -- chapter 37 2* Proper time in classical and quantum mechanics -- chapter 40 1 Incomplete Separation of Variables for Divalent Atoms -- chapter 40 2 On the Wave Functions of Many-Electron Systems -- chapter 43 -1 On the representation of an arbitrary function by an integral involving Legendre's function with a complex index -- chapter 47 1 On the Uncertainty Relation between Time and Energy -- chapter 50 -1 Application of two-electron functions in the theory of chemical bonds -- chapter 54 1 On the Schro�dinger equation of the helium atom -- chapter 57 1 On the Interpretation of Quantum Mechanics -- chapter 59 -1 On the canonical transformation in classical and quantum mechanics.