to succeed by this method, a problem in arithmetic would ultimately, as we have already remarked, solve the riddle of the universe. But this is the method adopted by those, referred to above, who think that all physiological effects ought to be reduced to form and combination, this, perhaps, to electricity, and this again to chemism, and chemism to mechanism. The mistake of Descartes, for example, and of all the Atomists, was of this last description. They referred the movements of the globe to the impact of a fluid, and the qualities of matter to the connection and form of the atoms, and hence they laboured to explain all the phenomena of nature as merely manifestations of impenetrability and cohesion. Although this has been given up, precisely the same error is committed in our own day by the electrical, chemical, and mechanical physiologists, who obstinately attempt to explain the whole of life and all the functions of the organism from “form and combination.” In Meckel's “Archiv für Physiologie” (1820, vol. v. p. 185) we still find it stated that the aim of physiological explanation is the reduction of organic life to the universal forces with which physics deals. Lamarck also, in his “Philosophie Zoologique,” explains life as merely the effect of warmth and electricity: le calorique et la matière électrique suffisent parfaitement pour composer ensemble cette cause essentielle de la vie (p. 16). According to this, warmth and electricity would be the “thing-in-itself,” and the world of animals and plants its phenomenal appearance. The absurdity of this opinion becomes glaringly apparent at the 306th and following pages of that work. It is well known that all these opinions, that have been so often refuted, have reappeared quite recently with renewed confidence. If we carefully examine the foundation of these views, we shall find that they ultimately involve the presupposition that the organism is merely an aggregate of phenomena of physical, chemical, and mechanical forces, which have come together here by chance, and produced the organism as a freak of nature without further significance. The organism of an animal or of a human being would therefore be, if considered philosophically, not the exhibition of a special Idea, that is, not itself immediate objectivity of the will at a definite higher grade, but in it would appear only those Ideas which objectify the will in electricity, in chemism, and in mechanism. Thus the organism would be as fortuitously constructed by the concurrence of these forces as the forms of men and beasts in clouds and stalactites, and would therefore in itself be no more interesting than they are. However, we shall see immediately how far the application of physical and chemical modes of explanation to the organism may yet, within certain limits, be allowable and useful; for I shall explain that the vital force certainly avails itself of and uses the forces of unorganised nature; yet these forces no more constitute the vital force than a hammer and anvil make a blacksmith. Therefore even the most simple example of plant life can never be explained from these forces by any theory of capillary attraction and endosmose, much less animal life. The following observations will prepare the way for this somewhat difficult discussion.

      It follows from all that has been said that it is certainly an error on the part of natural science to seek to refer the higher grades of the objectification of will to the lower; for the failure to recognise, or the denial of, original and self-existing forces of nature is just as wrong as the groundless assumption of special forces when what occurs is merely a peculiar kind of manifestation of what is already known. Thus Kant rightly says that it would be absurd to hope for a blade of grass from a Newton, that is, from one who reduced the blade of grass to the manifestations of physical and chemical forces, of which it was the chance product, and therefore a mere freak of nature, in which no special Idea appeared, i.e., the will did not directly reveal itself in it in a higher and specific grade, but just as in the phenomena of unorganised nature and by chance in this form. The schoolmen, who certainly would not have allowed such a doctrine, would rightly have said that it was a complete denial of the forma substantialis, and a degradation of it to the forma accidentalis. For the forma substantialis of Aristotle denotes exactly what I call the grade of the objectification of will in a thing. On the other hand, it is not to be overlooked that in all Ideas, that is, in all forces of unorganised, and all forms of organised nature, it is one and the same will that reveals itself, that is to say, which enters the form of the idea and passes into objectivity. Its unity must therefore be also recognisable through an inner relationship between all its phenomena. Now this reveals itself in the higher grades of the objectification of will, where the whole phenomenon is more distinct, thus in the vegetable and animal kingdoms, through the universally prevailing analogy of all forms, the fundamental type which recurs in all phenomena. This has, therefore, become the guiding principle of the admirable zoological system which was originated by the French in this century, and it is most completely established in comparative anatomy as l'unité de plan, l'uniformité de l'élément anatomique. To discover this fundamental type has been the chief concern, or at any rate the praiseworthy endeavour, of the natural philosophers of the school of Schelling, who have in this respect considerable merit, although in many cases their hunt after analogies in nature degenerated into mere conceits. They have, however, rightly shown that that general relationship and family likeness exists also in the Ideas of unorganised nature; for example, between electricity and magnetism, the identity of which was afterwards established; between chemical attraction and gravitation, and so forth. They specially called attention to the fact that polarity, that is, the sundering of a force into two qualitatively different and opposed activities striving after reunion, which also shows itself for the most part in space as a 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.

      If several of the phenomena of will in the lower grades of its objectification—that is, in unorganised nature—come into conflict because each of them, under the guidance of causality, seeks to possess a given portion of matter, there arises from the conflict the phenomenon of a higher Idea which prevails over all the less developed phenomena previously there, yet in such a way that it allows the essence of these to continue to exist in a subordinate manner, in that it takes up into itself from them something which is analogous to them. This process is only intelligible from the identity of the will which manifests itself in all the Ideas, and which is always striving after higher objectification. We thus see, for example, in the hardening of the bones, an unmistakable analogy to crystallisation, as the force which originally had possession of the chalk, although ossification is never to be reduced to crystallisation. The analogy shows itself in a weaker degree in the flesh becoming firm. The combination of humours in the animal body and secretion are also analogous