"Were our sight able to penetrate the interstitial spaces that exist inside the orbits of the oscillating intermolecules and analyze the conditions in those interstitial spaces, where dwells incalculable latent energy, we would be bewildered with amazement. And assuming our vision, which is limited by persistency, could follow the intermolecules in their rapid oscillations and the intermolecular etheric capsule as it revolves with infinite velocity like a transparent shell about the three component atoms that exist inside it, which in turn revolve in their orbits and oscillate with even a higher frequency than the intermolecules, we would still be only on the border gazing into the remote depths of the interstitial realms that stretch far down into the interatomic, etheric and interetheric subdivisions, and, within the interetheric subdivision at last arrive at the neutral center, the nucleus of everything we know as substance. This neutral center bears about the same relation to the etheric subdivision that the atomic subdivision bears to the crude molecular, in other words, its texture is as much finer than electrons as electrons are finer than coarse molecules."

See Also

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interstitial
INTERSTITIAL SPACES
interstitial substance
Latent Force in Interstitial Spaces
LATENT FORCE IN INTERSTITIAL SPACES - ELECTROMAGNETIC RADIATION - MOLECULAR DISSOCIATION
LATENT FORCE IN INTERSTITIAL SPACES - Snell