Abstract
A theory, analogous with the kinetic theory of heat, is described, in which the role of heat is shared by all the phenomena of extra-atomic physics, including quantum electrodynamics, gravitation, and relativistic mass. The role of the randomly moving molecules, as a mechanical model, is taken for all of these by a single model, consisting of a turbulent, dissipationless liquid, the motion of which conforms to Newtonian mechanics. This model is capable of supporting spherical standing waves which are taken to represent elementary particles. The mechanical counterparts of the physical equations are close approximations to those of the model