composition in the earliest phases of art, making way in its more advanced forms to the freer line, which is associated in our minds with organic form rather than such we meet with in the pyramid and similar geometrical shapes. Conformity to rule and symmetry are further important factors in the composition of music and poetry. Owing to the incident of duration in the length of tones we find in these arts an aspect of what is intrinsically a purely external relation, which is incompatible with any other more concrete mode of presentation. If we take the spatial condition it is obvious that here everything which lies in juxtaposition can be seen at a glance. It is otherwise with that which occurs in Time. Here we have merely a succession of moments, every one of which takes the place of another, and in this vanishing procession they flow on for ever. And it is precisely this indeterminacy which it is the function of musical time or beat to inform by adding thereto a real definition capable of uniform repetition. In this way the indefinite progression is subordinated to a rational principle. In musical time we have a power which exerts such a fascination upon us, that, so far from being able to treat it with indifference, we not unfrequently find ourselves beating time quite unconsciously with it while listening. This constant recurrence of equal lengths of time according to a definite measure has nothing to do with tones and their duration as we find them in Nature. Tone simply as musical sound and time abstractly regarded, are both of them equally indifferent to such uniform divisions and repetitions. Musical time is consequently something wholly created by the human mind; and indeed there is more than a suggestion of this in the fact that in listening to musical time we are at once impressed with the conviction, that we have, in this control of time according to fixed rule, nothing less than a real reflection of our spiritual nature, or rather that of the fundamental truth of self-identity, an illustration absolutely precise of the way in which the subject of consciousness applies this very principle of uniformity, unity with itself, that is to say, in constant recurrence, throughout all the variety and most intricate multiplicity of experience. And it is for this reason that the beat of musical time meets with such a startling response in the very depths of our being, gripping hold, as it does, of that self-identity, which is the fundamental abstract principle of our inmost life. Considered in this relation it is not; the spiritual content, not the concrete soul of our emotions, any more than it is the musical tone as tone, which appeals to us so intimately; it is simply the formal unity which the unity of consciousness transfers to the temporal process, and which is thus re-echoed back to our conscious life. And the same remarks apply to the measure and rhyme of poetry. The sensuous medium is here, too,