Maxwell’s most celebrated contribution was in deriving the equations governing electromagnetics (Maxwell’s equations). In his 1865 paper, A Dynamical Theory of the Electromagnetic Field, (This article followed a 8 December 1864 presentation by Maxwell to the Royal Society.) Maxwell defined electromagnetics in terms of 20 equations, later summarised in his 1873 book Treatise on Electricity and Magnetism.A Treatise on Electricity and Magnetism, James Clerk Maxwell, Clarendon Press, 1873 Hendrik Lorentz subsequently reinterpreted these as the fundamental equations of electrodynamics and Oliver Heaviside developed the notation we use today.
