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 176 C. L. MORGAN : 5. But what is our justification for this ejective procedure? The justification l>y results. We habitually act towards our neighbours as if they were conscious beings like ourselves, with results which point to the correctness of our hypothesis. (6) The justification based on descent. I have inherited from my ancestors certain brain-structures ; I have also inherited certain mental faculties. I have good reasons for believing that in my brain and nervous system nervous changes (neuroses) run parallel, or are identical with, changes of consciousness (psychoses). I am therefore impelled to be- lieve that my neighbours who have like me inherited a brain, have also like me inherited a mind ; and that in them also there is a parallelism or identity of neuroses and psychoses. 6. The next question that arises is this : How can we frame out of such materials a science of Human Psychology ? Since the only mind of which any man knows anything directly is his own, how can we arrive at any principles of general application? Only through Language ; and in the following way. A psychologist records, by means of lan- guage, the results at which he arrives by the only method open to him as a psychologist, that is by introspection. His successors receive his results ; and each submits them to the touchstone of his individual consciousness. He submits them to individual subjective verification. Thus the prin- ciples pass through many minds, and by each in turn are subjectively verified. Individual peculiarities are gradually eliminated ; and that which was at first but of limited application to the individual subject, becomes of general application to what may be termed the social eject. Language makes possible the social eject ; and thus makes possible a science of Human (as opposed to Individual) Psychology. 7. It may be well in passing to draw attention to the necessary limitations of Psychology as a science. The social eject, of which its generalisations are predicated, is in reality a class eject and not an universally human eject. The con- clusions of psychology hold good and have a scientific value just so far as, and for that class by which, they have been subjectively verified. But this class is a small one, composed of men whose minds are of a special calibre and who have had special training. Hence we must confess that our psychology holds good for civilised, but not of necessity for uncivilised, folk. It is a psychology of sages, but not of savages. 8. It may, I think, be fairly said that we have a fuller