motivity

Thus, if only the two bodies are available for engines to work between, the motivity is the measure of the energy lost when conduction brings about equalisation of temperature.

The name motivity of a system was proposed by Lord Kelvin in 1879 for this conception of available energy.

They were appealing to a fictitious motivity, one not grounded in "the nature of things."

Is it connected with the phenomena of exteriorization of sensitivity or motivity?

Here also seemed to be an unconscious corroboration of Albert de Rochas's experiments in the "externalization of motivity," as he calls it.