At the end of the 19th century, many tried to combine Newton's force law with the established laws of electrodynamics, like those of Weber, Carl Friedrich Gauss, Bernhard Riemann and James Clerk Maxwell.
He tried to explain the electrodynamics of James Clerk Maxwell by hydrodynamical analogies and similarly he proposed a mechanical explanation of gravitation.
Includes a previously unpublished manuscript on relativity and electrodynamics, a notebook documenting his preparation for his first joint paper (1913, with Marcel Grossmann), previously unknown calculations with Michele Besso on the motion of the perihelion of Mercury, etc.
These equations are the time-dependent generalization of Coulomb's law and the Biot-Savart law to electrodynamics, which were originally true only for electrostatic and magnetostatic fields, and steady currents.
Sin-Itiro Tomonaga (1906-1979), a Japanese physicist and Nobel Prize winner, influential in the development of quantum electrodynamics