Michelson' s interference experiment Electromagnetic phenomena in a system moving with any velocity less that of light On the electrodynamics of moving bodies Does the inertia of a body depend upon its energy content? Space and time On the influence gravitation on the propagation of light The foundation of the theory of relativity Hamilton's principle and the general theory of relativity Cosmological considerations on the general theory of relativity Do gravitational fields play an essential part in the structure of the elementary particicles of matier Gravitation and electricity