author
Sadi Carnot
1796–1832
A brilliant young French engineer and physicist, he laid the groundwork for thermodynamics with a single short book on heat engines. Though he died at just 36, his ideas shaped how scientists think about energy, efficiency, and the limits of machines.
1 Audiobook
Reflections on the motive power of heat : and on machines fitted to develop that power
by Sadi Carnot, Baron William Thomson Kelvin
About the author
Born in Paris on June 1, 1796, Nicolas Léonard Sadi Carnot was the eldest son of Lazare Carnot, a major figure of the French Revolution. He studied at the École Polytechnique and served as an officer in the engineering branch of the French Army, while also pursuing scientific questions about heat and machinery.
Carnot is best known for his 1824 work Reflections on the Motive Power of Fire, a remarkably influential study of steam engines. In it, he explored how heat produces mechanical work and described the idealized process now called the Carnot cycle, which became central to the development of thermodynamics.
He died in Paris on August 24, 1832, during a cholera epidemic. Carnot published little in his lifetime, but later scientists recognized how far ahead his thinking had been, and he is often remembered as one of the founding figures of modern thermodynamics.