Thermodynamics the work of French physicist Nicolas Léonard Sadi Carnot (1824) who believed that engine efficiency was the key that could help France win the Napoleonic Wars. Scots-Irish physicist Lord Kelvin was the first to formulate a concise definition of thermodynamics in 1854 which stated, "Thermo-dynamics is the subject of the relation of heat to forces acting between contiguous parts of bodies, and the relation of heat to electrical agency." The initial application of thermodynamics to mechanical heat engines was extended early on to the study of chemical compounds and chemical reactions. Chemical thermodynamics studies the nature of the role of
Jim Crow laws early as 1892 in the title of a "New York Times" article about Louisiana requiring segregated railroad cars. The origin of the phrase "Jim Crow" has often been attributed to "Jump Jim Crow", a song-and-dance caricature of blacks performed by white actor Thomas D. Rice in blackface, which first surfaced in 1832 and was used to satirize Andrew Jackson's populist policies. As a result of Rice's fame, "Jim Crow" by 1838 had become a pejorative expression meaning "Negro". When southern legislatures passed laws of racial segregation directed against blacks at the end of the 19th century, these statutes became known