From the 1878 book by Edwin Babbit.
Written at the turning point in human spiritual evolution when the Kali Yuga age of materialism reached its end. Babbit was one of the researchers of the time investigating the non-material, etheric aspects of earthly phenomena. In this chapter he discusses the "finer" frequencies of color.
CHAPTER NINTH. CHROMO-DYNAMICS, OR THE HIGHER GRADE LIGHTS AND FORCES.
1. INTRODUCTORY POINTS. 1. At last we come to a triumphant series of facts in proof of the fine fluidic forces which constitute the inner soul of things, and also in corroboration of the etherio-atomic law. By their aid we may ascend toward the key-stone of the great archway of power, and deal with those more subtile laws and potencies of vegetable, animal, human, and even world-life which are revealed by the higher grades of light and color.
2. We have seen in Chapter Fifth, XXIII, that there are strong proofs of new and beautiful grades of light and color above that which impresses the outward vision. The following semi-prophetic and semi-philosophic passage from Professor Tyndall, hinting at the fact that man has powers which may yet be developed to see these higher colors, is already being verified by actual facts:—"If we allowed ourselves to accept for a moment that notion of gradual growth, amelioration and ascension implied by the term evolution, we might fairly conclude that there are stores of visual impressions awaiting man far greater than those of which he is now in possession. For example, Ritter discovered in 1801, that beyond the extreme violet of the spectrum, there is a vast efflux of rays which are totally useless as regards our present powers of vision." That many persons are able to see these colors, and that many more can be developed into this power, will be shown more fully in the next chapter, in which also rules will be laid down for attaining it. This chapter will be devoted principally to the explanation of Odic light and color, together with some of the marvelous forces connected with man and nature which are revealed thereby, while the next chapter will deal more especially with man.