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Home > Dictionary of Science Quotations > Scientist Names Index C > Sadi Carnot Quotes

Thumbnail of Sadi Carnot (source)
Sadi Carnot
(1 Jun 1796 - 24 Aug 1832)

French engineer and physicist who spent much of his life investigating the design of steam engines. His work led to the development of thermodynamics.


Science Quotes by Sadi Carnot (3 quotes)

Portrait of Sadi Carnot in military jacket, upper body, facing front
1814 (source)
Already the steam-engine works our mines, impels our ships, excavates our ports and our rivers, forges iron, fashions wood, grinds grain, spins and weaves our cloths, transports the heaviest burdens, etc. It appears that it must some day serve as a universal motor, and be substituted for animal power, waterfalls, and air currents.
— Sadi Carnot
'Rιflexions sur la puissance motrice du feu' (1824) translated by R.H. Thurston in Reflections on the Motive Power of Fire, and on Machines Fitted to Develop that Power (1890), 38.
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The production of motion in the steam engine always occurs in circumstances which it is necessary to recognize, namely when the equilibrium of caloric is restored, or (to express this differently) when caloric passes from the body at one temperature to another body at a lower temperature.
— Sadi Carnot
'Réflexions sur la Puissance Motrice du Feu et sur les Machines Propres a Développer cette Puissance' (1824). Trans. Robert Fox, Reflexions on the Motive Power of Fire (1986), 64.
Science quotes on:  |  Body (537)  |  Circumstance (136)  |  Circumstances (108)  |  Engine (98)  |  Equilibrium (33)  |  Express (187)  |  Heat (174)  |  Motion (312)  |  Necessary (363)  |  Occur (150)  |  Production (183)  |  Recognize (125)  |  Steam (80)  |  Steam Engine (46)  |  Temperature (79)  |  Thermodynamics (40)

The thermal agency by which mechanical effect may be obtained is the transference of heat from one body to another at a lower temperature.
— Sadi Carnot
'Rιflexions sur la puissance motrice du feu' (1824) translated by R.H. Thurston in Reflections on the Motive Power of Fire, and on Machines Fitted to Develop that Power (1890), 139.
Science quotes on:  |  Agency (14)  |  Body (537)  |  Effect (394)  |  Heat (174)  |  Mechanical (140)  |  Mechanics (132)  |  Obtain (163)  |  Temperature (79)  |  Thermal (15)  |  Transfer (20)



Quotes by others about Sadi Carnot (1)

War and the steam engine joined forces and forged what was to become one of the most delicate of concepts. Sadi Carnot … formed the opinion that one cause of France’s defeat had been her industrial inferiority. … Carnot saw steam power as a universal motor. … Carnot was a visionary and sharp analyst of what was needed to improve the steam engine. … Carnot’s work … laid the foundations of [thermodynamics].
In The Second Law (1984), 1-2.
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See also:

Carl Sagan Thumbnail In science it often happens that scientists say, 'You know that's a really good argument; my position is mistaken,' and then they would actually change their minds and you never hear that old view from them again. They really do it. It doesn't happen as often as it should, because scientists are human and change is sometimes painful. But it happens every day. I cannot recall the last time something like that happened in politics or religion. (1987) -- Carl Sagan
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