dispersion in opposite directions, is a fundamental type of almost all the phenomena of nature, from the magnet and the crystal to man himself. Yet this knowledge has been current in China from the earliest times, in the doctrine of opposition of Yin and Yang. Indeed, since all things in the world are the objectification of one and the same will, and therefore in their inner nature identical, it must not only be the case that there is that unmistakable analogy between them, and that in every phenomenon the trace, intimation, and plan of the higher phenomenon that lies next to it in point of development shows itself, but also because all these forms belong to the world as _idea_, it is indeed conceivable that even in the most universal forms of the idea, in that peculiar framework of the phenomenal world space and time, it may be possible to discern and establish the fundamental type, intimation, and plan of what fills the forms. It seems to have been a dim notion of this that was the origin of the Cabala and all the mathematical philosophy of the Pythagoreans, and also of the Chinese in Y-king. In the school of Schelling also, to which we have already referred, we find, among their efforts to bring to light the similarity among the phenomena of nature, several attempts (though rather unfortunate ones) to deduce laws of nature from the laws of pure space and time. However, one can never tell to what extent a man of genius will realise both endeavours. Now, although the difference between phenomenon and thing-in-itself is never lost sight of, and therefore the identity of the will which objectifies itself in all Ideas can never (because it has different grades of its objectification) be distorted to mean identity of the particular Ideas themselves in which it appears, so that, for example, chemical or electrical attraction can never be reduced to the attraction of gravitation, although this inner analogy is known, and the former may be regarded as, so to speak, higher powers of the latter, just as little does the similarity of the construction of all animals warrant us in mixing and identifying the species and explaining the more developed as mere variations of the less developed; and although, finally, the physiological functions are never to be reduced to chemical or physical processes, yet, in justification of this procedure, within certain limits, we may accept the following observations as highly probable.