Wikimedia
Wikipedia: Carnot Heat Engine
Wikipedia offers information on the Carnot heat engine that uses a particular thermodynamic cycle developed by Nicolas Carnot in 1820.
Wolfram Research
Wolfram Science World: Carnot, Sadi (1796 1832)
A brief overview of Sadi's (1796-1832 CE) life. Contains a link to an explanation of the Carnot cycle, a thermodynamic cycle involving the temperature and pressure of gases.
