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James Clerk Maxwell, , (1831 - 1879) Born in Edinburgh, Scotland, was among the greatest physicists of the nineteenth, century. He derived the thermal velocity distribution of molecules in a gas and was among the first to, obtain reliable estimates of molecular parameters from measurable quantities like viscosity, etc., Maxwell's greatest acheivement was the unification of the laws of electricity and magnetism, (discovered by Coulomb, Oersted, Ampere and Faraday) into a consistent set of equations now called., Maxwell's equations. From these he arrived at the most important conclusion that light is ark, electromagnetic wave. Interestingly, Maxwell did not agree with the idea (strongly suggested by the, Faraday’s laws of electrolysis) that electricity was particulate in nature.