Sir William Thomson, Baron Kelvin of Largs, Lord Kelvin (1824 - 1907) Scotland
Played a major role in developing the ideas of absolute temperature, the Second Law of Thermodynamics, and the dynamical theory of heat. Entered Cambridge at age 17. He was a scholar-athlete - champion rower. Professor of Natural Philosophy at the University of Glasgow. 1848 proposed the absolute temperature scale. 1852 discovered the "Joule-Thomson Effect" of gases. Published over 600 papers. Knighted for his work on the first transatlantic cable for telegraph.