In the first place, it is needful to protest against an argument which our author adopts on the authority of Professor Clark Maxwell. The argument is now a well-known one, and is thus stated by Professor Maxwell in his presidential address before the British Association for the Advancement of Science, 1870:--"None of the processes of nature, since the time when nature began, have produced the slightest difference in the properties of any molecule. We are therefore unable to ascribe either the existence of the molecules or the identity of their properties to the operation of any of the causes which we call natural. On the other hand, the exact quality of each molecule to all others of the same kind gives it, as Sir John Herschel has well said, the essential character of a manufactured article, and precludes the idea of its being eternal and self-existent. Thus we have been led along a strictly scientific path, very near to the point at which science must stop. Not that science is debarred from studying the external mechanism of a molecule which she cannot take to pieces, any more than from investigating an organism which she cannot put together. But in tracing back the history of matter, science is arrested when she assures herself, on the one hand, that the molecule has been made, and, on the other, that it has not been made by any of the processes we call natural." Now it is obvious that we have here no real argument, since it is obvious that science can never be in a position to assert that atoms, the very existence of which is hypothetical, were never "made by any of the processes we call natural." The mere fact that in the universe, as we now know it, the evolution of material atoms is not observed to be taking place "by any of the processes we call natural," cannot possibly be taken as proof, or even as presumption, that there ever was a time when the material atoms now in existence were created by a supernatural cause. The fact cannot be taken to justify any such inference for the following reasons. In the first place, assuming the atomic theory to be true, and there is nothing in the argument to show that the now-existing atoms are not self-existing atoms, endowed with their peculiar and severally distinctive properties from all eternity. Doubtless the argument is, that as there appear to be some sixty or more elementary atoms constituting the raw material of the observable universe, it is incredible that they can all have owed their correlated properties to any cause other than that of a designing and manufacturing intelligence. But, in the next place--and here comes the demolishing force of the criticism--science is not in a position to assert that these sixty or more elementary atoms are in any real sense of the term elementary. The mere fact that chemistry is as yet in too undeveloped a condition to pronounce whether or not all the forms of matter known to her are modifications of some smaller number of elements, or even