P.327 - §3 4. Energy Transmitters. These beings function chiefly, but not wholly, in an intraplanetary capacity. They are marvelous dispatchers of energy as it is manifested on the individual worlds.
P.327 - §4 When energy is to be diverted to a new circuit, the transmitters deploy themselves in a line along the desired energy path, and by virtue of their unique attributes of energy-attraction, they can actually induce an increased energy flow in the desired direction. This they do just as literally as certain metallic circuits directionize the flow of certain forms of electric energy; and they are living superconductors for more than half of the thirty forms of physical energy.
P.439 - §0 The mechanical controllers, two of them, next take their positions. By this time the transport seraphim has become an almost transparent, vibrating, torpedo-shaped outline of glistening luminosity. Now the transport dispatcher of the realm summons the auxiliary batteries of the living energy transmitters, usually one thousand in number; as he announces the destination of the transport, he reaches out and touches the near point of the seraphic carriage, which shoots forward with lightninglike speed, leaving a trail of celestial luminosity as far as the planetary atmospheric investment extends. In less than ten minutes the marvelous spectacle will be lost even to reinforced seraphic vision.