As Stallo shows, the existence of Ether is accepted in Physical Astronomy, in ordinary Physics, and in Chemistry.
By the astronomers, this æther was originally regarded as a fluid of extreme tenuity and mobility, offering no sensible resistance to the motions of celestial bodies, and the question of its continuity or discontinuity was not seriously mooted. Its main function in modern astronomy has been to serve as a basis for hydro-dynamical theories of gravitation. In physics this fluid appeared for some time in several rôles in connection with the “imponderables” [so cruelly put to death by Sir William Grove], some physicists going so far as to identify it with one or more of them.[799]
Stallo then points out the change caused by the kinetic theories; that from the date of the dynamical theory of heat, Ether was chosen in Optics as a substratum for luminous undulations. Next, in order to explain the dispersion and polarization of light, Physicists had to resort once more to their “scientific imagination,” and forthwith endowed the Ether with (a) atomic or molecular structure, and (b) with an enormous elasticity, “so that its resistance to deformation far exceeded that of the most rigid elastic bodies.” This necessitated the theory of the essential discontinuity of Matter, hence of Ether. After having accepted this discontinuity, in order to account for dispersion and polarization, theoretical impossibilities were discovered with regard to such dispersion. Cauchy's “scientific imagination” saw in Atoms “material points without extension,” and he proposed, in order to obviate the most formidable obstacles to the undulatory theory (namely, some well-known mechanical theorems which stood in the way), to assume that the ethereal medium of propagation, instead of being continuous, should consist of particles separated by sensible distances. Fresnel rendered the same service to the phenomena of polarization. E. B. Hunt upset the theories of both.[800] There are now men of Science [pg 528] who proclaim them “materially fallacious,” while others—the “atomo-mechanicalists”—cling to them with desperate tenacity. The supposition of an atomic or molecular constitution of Ether is upset, moreover, by thermo-dynamics, for Clerk Maxwell showed that such a medium would be simply gas.[801] The hypothesis of “finite intervals” is thus proven of no avail as a supplement to the undulatory theory. Besides, eclipses fail to reveal any such variation of colour as is supposed by Cauchy, on the assumption that the chromatic rays are propagated with different velocities. Astronomy has pointed out more than one phenomenon absolutely at variance with this doctrine.
Thus, while in one department of Physics the atomo-molecular constitution of the Ether is accepted in order to account for one special set of phenomena, in another department such a constitution is found to be quite subversive of a number of well-ascertained facts; and Hirn's charges are thus justified. Chemistry deemed it
Impossible to concede the enormous elasticity of the æther without depriving it of those properties, upon which its serviceableness in the construction of chemical theories mainly depended.
This ended in a final transformation of Ether.
The exigencies of the atomo-mechanical theory have led distinguished mathematicians and physicists to attempt a substitution for the traditional atoms of matter, of peculiar forms of vortical motion in a universal, homogeneous, incompressible, and continuous material medium [Ether].[802]
The present writer—claiming no great scientific education, but only a tolerable acquaintance with modern theories, and a better one with Occult Sciences—picks up weapons against the detractors of the Esoteric Teaching in the very arsenal of Modern Science. The glaring contradictions, the mutually-destructive hypotheses of world-renowned Scientists, their disputes, their accusations and denunciations of each other, show plainly that, whether accepted or not, the Occult Theories have as much right to a hearing as any of the so-called learned and academical hypotheses. Thus, whether the followers of the Royal Society choose to accept Ether as a continuous or as a discontinuous fluid matters little, and is indifferent for the present purpose. It simply points to one certainty: Official Science knows nothing to this day of the constitution of Ether. Let Science call it Matter, if it likes; only [pg 529] neither as Âkâsha, nor as the one sacred Æther of the Greeks, is it to be found in any of the states of Matter known to modern Physics. It is Matter on quite another plane of perception and being, and it can neither be analyzed by scientific apparatus, nor appreciated or even conceived by the “scientific imagination,” unless the possessors thereof study the Occult Sciences. That which follows proves this statement.
It is clearly demonstrated by Stallo as regards the crucial problems of modern Physics, as was done by De Quatrefages and several others in those of Anthropology, Biology, etc., that, in their efforts to support their individual hypotheses and systems, most of the eminent and learned Materialists very often utter the greatest fallacies. Let us take the following case. Most of them reject actio in distans—one of the fundamental principles in the question of Æther or Âkâsha in Occultism—while, as Stallo justly observes, there is no physical action “which, on close examination, does not resolve itself into actio in distans”; and he proves it.
Now, metaphysical arguments, according to Professor Lodge,[803] are “unconscious appeals to experience.” And he adds that if such an experience is not conceivable, then it does not exist. In his own words: