At this point--one not merely theoretical, or speculatively possible only, but absolutely fixed and determinable in our backward survey of the vital forces of nature--we find individual parentage lost in a natural matrix, or in the vital principle implanted as a "primordium," in the earth itself. To this inevitable induction of Dr. Harvey we are all driven in the end, by those intuitive processes of reasoning which are hardly less conclusive than mathematical induction itself. We may call these "primordia viventium" plastide particles, bioplasts, vital units, or whatsoever we will,--the name is nothing, the working process is everything. Scientific speculation accomplishes nothing, therefore, by its new terminology, except it be to confound the ignorant and astonish the wise. To call the homogeneous basis of an egg "blastima," and its germinal point a "blastid," is all well enough in its way; but it adds no new knowledge, nor additional wealth of language, wherewith to predicate vital theories, whether they relate to the progeny of a hen-coop or the lair of a tiger in an Indian jungle. Teach us to know what nature _does_, not what she _is_; and whatever of "divine revelation" is vouchsafed us, whether it be found in the majestic "Poem of the Dawn," attributed to the inspired pen of Moses, in the "myriad-minded Shakespeare," or the irradiated and deeply-prophetic soul of a Shelley, let us accept it with thanks, if not to the inspired authors themselves, at least to "the great Giver of life" who imparted their inspiration. We accept the theory of "primordial germs," not simply because it is contained in the Bible Genesis, nor because it was conceived by the great and gifted Harvey as a possible solution of the whole difficulty, but because it presents, as we have before said, a satisfactory explanation of all the phenomenal facts of life with which we are acquainted. If Mr. Herbert Spencer will descend from his stilted theory of "molecular machinery worked by molecular force," and tell us what it all means; and, at the same time, turn us out a single plastide particle, or fungus spore, by any generating process referable to "the machinery" in question, we will as devoutly worship Matter and Motion as ever ancient Egyptian did the god Osiris. But until he does this, we prefer to accept the positive assurance of Professor Lionel S. Beale, a far more competent authority to speak of hypothetical molecules, that none of the "forces possessed by the molecules of which the primitive nebulosity of the universe was composed" ever produced a vital manifestation, or succeeded in "making life a slave to force." We shall consider this question of "molecular force" in its proper place, and with reference to the different theories of life advanced by the materialists, without pursuing it further in this connection.