IN all ages of which we have any authentic knowledge, and among all races, there have existed Philosophers, Investigators or Students of the Occult, who have in divers forms, and many languages, repeatedly averred that the Universe-both visible and invisible—exemplified varied expressions of a single principle-VIBRATION. During the last two centuries we have abandoned the theoretical and hypothetical science of the Ancients, and have gradually built up a coherent fabric by logical deductions from actual study of the facts and phenomena of the objective world. Up to a few decades ago, the various truths postulated by science had not fully conformed to a condition of" harmonious correlated Unity," which theoretically should be the case according to Herbert Spencer. The Chemical Elements were apparently distinct, unalterable, and bore no mathematical relation to each other. Seventy or more varieties of solid indivisible atoms formed the basis of the material universe, and behind these was a hypothetical" Ether" of absolutely unknown nature. Matter was called" dead," or" living," according to the reflected phenomena, and an apparently boundless gulf existed between the two. Science was becoming more and more complex when the advance guards of a new era appeared, headed by Clerk Maxwell with his" Electro-magnetic Theory of Light," and Mendelejeff with his" Periodic Law of the Elements," and rapidly followed by Crookes, Tesla, Curie, Becquerel, Hertz and JJ Thompson, whose labors and researches have focused in the greatest discovery of any age-THE ELECTRON THEORY. Although recent and revolutionary, this hypothesis has met with instant and eager acceptance on the part of the leading scientists throughout the world. In the bright light which it throws on the phenomena of the universe, much that was dark and undefined has become lucid and coher-V