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Rh, unified or discrete, according as the psycho-physical total waves that subserve it are themselves continuous or discontinuous above the threshold. . ..

"If, in the diagram, we should raise the entire line of waves so that not only the crests but the valleys appeared above the threshold, then these latter would appear only as depressions in one great continuous wave above the threshold, and the discontinuity of the consciousness would be converted into continuity. We of course cannot bring this about. We might also squeeze the wave together so that the valleys should be pressed up, and the crests above the threshold flow into a line; then the discretely-feeling organisms would have become a singly-feeling organism. This, again, Man cannot voluntarily bring about, but it is brought about in Man's nature. His two halves, the right one and the left one, are thus united; and the number of segments of radiates and articulates show that more than two parts can be thus psycho-physically conjoined. One need only cut them asunder, i. e. interpolate another part of nature between them under the threshold, and they break into two separately conscious beings." . . . [Elemente der Psychophysik, 1860, vol. ii. pp. 526-530.]

One sees easily how, on Fechner's wave-scheme,