investigation which remains still to be carried out. In so far as the consideration of these factors entered into the experimental work of the present research, such quantitative time relations are given in the following table, the two types in all cases occurring in simple alternation: TABLE XXI. Rhythm. 1st Meas. 2d Meas. Rhythm. 1st Meas. 2d Meas. . > > > > . q q q; q q % 1.000 1.091 q q %; q q q 1.000 1.140 . > > . q q q; q q % 1.000 1.159 q q %; q q q 1.000 1.021 . > > . q q q; q q % 1.000 1.025 q q %; q q q 1.000 1.267 > . . > q q q; q q % 1.000 0.984 q q %; q q q 1.000 1.112 > . . > q q q; q q % 1.000 0.766 q q %; q q q 1.000 1.119 As the disparity in numerical constitution increases, so will also the divergence in time-value of the two groups concerned. When differentiation into major and minor phases is present, the duration of the former will be greater than that of the latter. Hence, in consequence of the combination of these two factors--_e.g._, in a syncopated measure of unusual emphasis--the characteristic time-values may be inverted, and the briefer duration attach to that unit which comprises the greater number of elements. Intensive values cannot take the place of temporal values in rhythm; the time form is fundamental. Through all variations its equivalences must be adhered to. Stress makes rhythm only when its recurrence is at regular intervals. The number of subordinate factors which combine with the accented element to make the group is quite indifferent. But whether few or many, or whether that element on which stress falls stands alone (as it may), the total time values of the successive groups must be sensibly equivalent. When a secondary element is absent its place must be supplied by a rest of equivalent time-value. If these proper temporal conditions be not observed no device of intensive accentuation will avail to produce the impression of metrical equivalence among the successive groups. B. _The Distribution of Elements Within the Group._ (_a_) The Distribution of Intensities.