probably be given only two beats, but in an adagio movement, as, e.g., the first part of the Messiah overture, it may be necessary to beat eight for each measure in order to insure rhythmic continuity. There are many examples of triple measure in which the movement is so rapid as to make it impracticable to beat three in a measure, and the conductor is therefore content merely to give a down-beat at the beginning of each measure; waltzes are commonly conducted by giving a down-beat for the first measure, an up-beat for the second, et cetera; a six-part measure in rapid tempo receives but two beats; while 9–8 and 12–8 are ordinarily given but three and four beats respectively.
It is not only annoying but absolutely fatiguing to see a conductor go through all manner of contortions in trying to give a separate beat to each pulse of the measure in rapid tempos; and the effect upon the performers is even worse than upon the audience, for a stronger rhythmic reaction will always be stimulated if the rhythm is felt in larger units rather than in smaller ones. But on the other hand, the tempo is sometimes so very slow that no sense of continuity can be aroused by giving only one beat for each pulse; hence, as already noted, it is often best to give double the number of beats indicated by the measure sign. In general, these two ideas may be summarized in the following rule: As the tempo becomes more rapid, decrease the number of beats; but as it becomes slower, increase the number, at the same time elaborating the beat so as to express more tangibly the idea of a steady forward movement.
In order to clarify these matters still further another series of figures is here supplied, these giving the more highly elaborated movements employed in slower tempos. As in the case of the diagrams on pages 23 and 24 these figures are intended to be suggestive only, and it is not expected that any one will copy the indicated movements exactly as given.
