It remains doubtful, however, whether this reversibility can explain all the synthetic processes in the cell.
This energy limit for reversibility is then imposed by the cohesive properties of the material or by its elastic limits.
This leads me to the enunciation of a principle which underlies all optical phenomena—the principle of reversibility.
The ratio of the maximum or limiting energy for reversibility to the total energy of the system may vary in value.
This property of reversibility is also shared by the process of Carnot.
The combination of invariability and reversibility in the Peirce pendulums was an innovation for relative determinations.
The amount of energy which would now be working in that process may be termed the limiting energy for reversibility.