These phenomena are, however, only particular cases of the general law of Energetics that transformation requires a stimulus.
"The Mechanism of Life"
Stéphane Leduc
The first principle of Energetics, the conservation of energy, may be thus expressed: "Energy is eternal; none is ever created, and none is ever lost.
"The Mechanism of Life"
Stéphane Leduc
The exponents of what is called "Energetics" have in many cases come to regard that the quantity of which is so conserved, as a substantial reality whose forms and distributions compose nature.
"The Approach to Philosophy"
Ralph Barton Perry