It is undeniably true that the progress of scientific thought and speculative inquiry, both in this country and in Europe, is rapidly tending towards a purely materialistic view of the universe, or one that utterly excludes the ancient and long-predominating metaphysical conceptions of Life, to say nothing of the more regnant and universally prevailing conception of a God. And it is quite as undeniable that the current of experimental research and investigation is setting, with equal rapidity, in the same direction. According to the views of many of our more advanced chemists, physiologists, and other scientific and speculative writers and thinkers--those whose experimental investigations have, it is claimed, reached the ultimate implications of all material substance--there are but two immutable, indestructible, and thoroughly persistent elements in the universe--_Matter_ and _Motion_. Everything else, they confidently assert, is either purely phenomenal, or else essentially mutable, ephemeral, transitory. Force, according to their theory, is only another name for motion or its correlates, and, hence, the two terms are interchangeably used by them in predicating their ultimate conclusions respecting matter. Light, heat, electricity, magnetism, chemical affinity, molecular force, and even life itself, are only so many manifestations or expressions, they claim, of one and the same force in the universe--_Motion_, With the exception of matter, it is the only self-persistent, permanently enduring, ever active and reactive agency. Light, they say, is dependent, heat conditional, electricity and magnetism more or less phenomenal, chemical affinity and molecular force mere modes or correlated forms of motion, and all-pervading life itself a mere postulate of the schools, or at best only the result of the dynamic force of molecules. Deem not this collocation simply a burlesque on Scientific categories. Professor Bastian, in his great work on the "Beginnings of Life," has unhesitatingly said: "The 'vitalists' must give up their last stronghold--we cannot even grant them a right to assume the existence of a special 'vital force' whose peculiar office it is to effect the transformation of physical forces. The notion that such a force does exist, is based on no evidence; it is a mere postulate. The assumption of its existence carries with it nothing but confusion and contradiction, because the very supposition that it exists, and does so act, is totally averse to the general doctrine of the correlation of forces."