It's important to remember that the laws of thermodynamics weren't established by just two individuals. Many scientists contributed to their development over time. However, two prominent figures who played crucial roles are:

* Sadi Carnot (1796-1832): Carnot is considered the "father of thermodynamics" for his work on the efficiency of steam engines. His 1824 book, "Reflections on the Motive Power of Fire," laid the groundwork for the first and second laws of thermodynamics.

* Rudolf Clausius (1822-1888): Clausius further developed Carnot's ideas and formalized the first and second laws of thermodynamics in mathematical terms. He also introduced the concept of entropy.

Other important contributors include:

* James Prescott Joule (1818-1889): Joule established the equivalence of mechanical work and heat, a fundamental concept in thermodynamics.

* William Thomson, Lord Kelvin (1824-1907): Kelvin made significant contributions to the understanding of the second law of thermodynamics and established the absolute temperature scale.

Therefore, it's inaccurate to attribute the laws of thermodynamics solely to two scientists. It was a collaborative effort involving many individuals.