And here we may as well anticipate an objection which will be raised against the presence of this animating principle of life in the earth, as to meet and answer it further on in the argument. But as the objection to which we refer is one of those dragon's teeth we do not care to leave behind us, we will meet it at the very threshold of the controversy. It will probably be admitted that the vegetation of the earth may appear in the way and manner indicated in the biblical genesis, the same as infusorial forms appear in super-heated and hermetically-sealed flasks. But how about the preëxisting germs or vital units of the mastodon, the megatherium, and other gigantic mammiferous quadrupeds of the Eocene period? From what experimental flasks, in the great laboratory of nature, did they first make their appearance? The objection is a legitimate one, and we will answer it. But first, let us do so from the materialist's own stand-point. Time, they all agree, is practically infinite--past time, as well as future; while matter is susceptible of an infinite number of diverse movements, changes, modifications, combinations, etc.,[9] chemically as well as molecularly considered. This, they claim, is not a mere hypothetical judgment, but a mathematically demonstrable proposition. Grant it for the sake of the argument, and then see if the mastodon does not promptly emerge from some one of their "experimental flasks," as they choose to put it. For if the number of these diverse movements, changes, modifications, etc., of matter, have been infinite, in its progress from the lowest statical to the highest dynamical manifestation, then every possible, as well as conceivable, form of matter, must have existed somewhere, and at some time, in nature, even to its highest and most potentially endowed plasmic form in which there is life. And if this be true, and the materialists will not deny but rather affirm it, then the inter-uterine conditions of matter, in the case of all animals (the mastodon included), as well as the inter-cellular conditions in the case of all plant-life, must have existed, with their necessary environments, somewhere and at some time, in the all-hutched laboratory of nature. Hence, in the infinite number of these changes and combinations--in the countless collocations of molecules and chemically changed conditions of matter, we have the possibilities of all terrestrial life-manifestations, as we have, in the infinite number of cosmical changes, the possibilities of all planetary, cometary, and asteroidal manifestations. For whenever these vital changes occur, the life-manifestations dependent thereon, must as inevitably follow as that infinitely diffused matter should be aggregated by gravity, or by what Humboldt calls, in his "Cosmos," the "world-arranging Intelligence" of the universe.