It may be, however, that I shall here be met by the statement, that some distinguished geologists maintain the probable existence of organized beings on the globe at an indefinitely earlier period than that in which their remains first appear in the rocks. They contend that the extreme heat which has melted the older rocks has obliterated all traces of organic existence below a certain line. Now, in order to meet this difficulty, it is not necessary to show this opinion to be erroneous. We have only to advance another step in our general argument, which brings us upon ground admitted to be good by the geologists above alluded to. They all of them believe that many new animals and plants have from time to time appeared on the globe; that, in fact, there have been several almost entire changes in its inhabitants. Most of them suppose these new races to have been introduced in large numbers at particular epochs, though some prefer the theory which supposes the new species to have been introduced one by one, as the old ones became extinct. But even this supposition does not essentially affect my argument; because they all allow that these successive species were really new, and could not have been the result of any metamorphosis of the old species. And it is the fact that new organic beings have, from time to time, been created, that is alone essential to my argument. Whether they were created by groups or singly, is an interesting geological question; but, in either case, miraculous power must have been put forth as really and as efficiently to call into existence a single new species of animalcula, or sea-weed, as to introduce an entirely new race. The successive economies of organic life that have existed on the earth, and passed from it, do most unequivocally demonstrate the extraordinary or miraculous providence of God.