Today, 201 years ago, on June 26, 1824 (Calendar 30 May 1824), Irish mathematical physicist William Thomson was born. William Thomson, named after Baron I of Calvin or Lord Kelvin (1st Baron Kelvin or Lord Kelvin). Born on June 26, 1824 in Belfast, Ireland, and died in Lagos, Scotland on December 17, 1907. for Irish mathematical physicist and engineer. He was also the inventor of the thermal termometer (absolute termometer) and is known as the father of thermodynamics. The thermodynamic termometer is the unit of temperature in the international unit.