ADDENDUM.
The great Solar Cone-space, in order to be clearly marked to the eye, was represented in Plate I, page 30, as white. This to some readers may be misleading; as this space when viewed transversely is not luminous,—it is not even visible. (Pl. V.)
Pl. V. Solar Cone, Or Cone-Space.
Outside of the atmospheric envelope of all spheres, there is only "the black of infinite space."[E]
Retro-action between the earth and visible and invisible spheres, gives to the earth the light which it possesses during the night-season.