rhythmical row of beats the agreeableness is generally very moderate, we clearly observe that with many individuals the feeling of pleasure contained in it often sinks below the threshold of consciousness, so that they only perceive the objective constitution of the beats. With others this subjective reaction becomes very prominent. The feeling of pleasure will, as is well known, become more intense, when harmonious tones combine with the rhythmical beat into one melodious whole. The agreeable feeling that then arises from the melody can scarcely be wanting in any individual consciousness. Just here we note that the degree of this feeling of pleasure for one and the same melody can vary extraordinarily for different individuals. And these subjective differences increase more and more as the melodious compound becomes more complicated. A complicated tone-structure may produce the greatest ecstasy in a musician, whereas it may leave an unmusical person absolutely cold. The latter, on the other hand, may perhaps find a very simple melody agreeable, and this same melody may appear trivial to the musician and therefore disagreeable. In all these cases we see that the feeling of pleasure, which is bound to certain sensations and ideas, is purely subjective. It is an element that is not only dependent upon the impression itself, but also and always and most of all dependent upon the subject receiving the impression. And negatively the subjective character of this feeling is shown in the fact that it is never projected into the outer world, although it may be so closely bound up with the idea that refers to the outer world. But feelings of pleasure are not the only ones that we observe in our rhythm experiments. If we call to mind the exact state of consciousness between two beats of a rhythmical row, we notice that the apprehension of the identity of two intervals arises by means of a subjective process. This process takes place in the same manner within each of the two compared intervals, and thereby gives rise to the impression that they coincide. In ordinary life we generally speak of the phenomena, that are observed in such cases, as a change from "expectation" to "realisation." If we follow these phenomena a little more closely, we notice that in our case the process of expectation is a continuous and regularly varying one. At the moment immediately following one beat, expectation strains itself to catch the next one, and this straining increases until this beat really occurs. At the same moment the strain is suddenly relieved by the realisation of the expected, when the new beat comes. Then the same process is repeated during the next interval. If the arrangement of the beat is more complicated because of different degrees of emphasis, then these subjective processes become in proportion more complicated, since several such processes of expectation and realisation overlap one another.