Quote by William John Macquorn Rankine
This law (regarding the theoretical efficiency of heat engines by Mr. Joule), and the law of the maximum efficiency of heat engines, are particular cases of a general law which regulates all transformation of energy, and is the basis of the Science of Energetics.
Summary
This quote explains that the law proposed by Mr. Joule regarding the theoretical efficiency of heat engines, along with the law of the maximum efficiency of heat engines, are specific examples of a broader law that governs all energy transformations. This general law serves as the foundation for the Science of Energetics, which studies various aspects and principles related to energy.