[29] This refers to triboluminescence, which is the energy, expressed as light, given off by electrons
returning to their rest-orbits after having been excited due to the pressure arising when stones are
rubbed together. This emission of energy is a net gain to the overall energy-content of water. See
The Water Wizard, "Fire under Water". - Ed.
See Also
The Ox and the Chamois
Triboelectric series
Triboelectric effect
triboluminescence