telescope when closed, may be extended. The evolution of religion on this view has been a process literally of 'evolution' or unfolding: the idea of a god and of communion with him has been present from the beginning; and, much though religion may have changed, it remains to the end essentially the same thing. This view of the process of religious evolution we may fairly term 'the pre-formation theory'; for on this theory each stage is pre-formed in the stage immediately preceding it, and in the earliest stage of all were all succeeding stages contained pre-formed, though it depended on circumstances whether the seed should spring up, and how many stages of its growth it should accomplish. Robertson Smith's theory of the evolution of religion is in effect a form of the pre-formation theory, and is liable to the same difficulties as dog the theory of pre-formation in all its applications. On the theory, if we cut open a seed we should find within it the plant pre-formed; if we analyse totemism, the seed from which, in Robertson Smith's view, all other forms of religion have grown in orderly succession one after the other, we find in it religion in all its stages pre-formed. In fact, however, if we cut open an acorn we do not find a miniature oak-tree inside. The presumption, therefore, is that neither in totemism, if we dissect it, shall we find religion pre-formed. Indeed, there is the possibility that totemism, on dissection, will be found to have no such content--that the hope or expectation of finding anything in it is as vain, is as much doomed to disappointment, as is the expectation of the child who cuts open his drum, thinking to find inside it something which produces the sound.