infant. Sigismund says: “I have often seen three- and four-year-old children skip about when they heard enlivening band music, as if they wished to catch the time of the rhythmic movement, an impulse which indeed affects adults as well,[44] as all well know.” Here we have inner imitation, the central fact of æsthetic enjoyment, displayed by the veriest babes. Children show their enjoyment of rhythm, too, in their preference for strongly accented poetry.[45] Even half-grown boys and girls take but little note of sense, compared with the interest which they bestow on rhythm and rhyme. That a normally endowed girl could interpret the words of a poem, Singing on its Way to the Sea, as Singing on its Waiter, etc., without having her curiosity aroused, can only be explained by this fact.[46] Is it not a frequent experience of full-grown men to be suddenly struck with the profound truth hidden in some epigrammatic form of expression whose euphony has a hundred times delighted them? They have actually failed up to that time to grasp the clear, logical meaning of the verse or passage. Indifference to the words of their songs is most marked among primitive peoples, while with children an instinctive demand for some employment of their organs of hearing has much to do with their pleasure in harmony and rhythm. The following facts justify this statement: The disposition toward acoustic expression is particularly susceptible to satisfaction from sensuously agreeable stimuli, such as are responsive to harmony, melody and rhythm, partly on known and partly on unknown grounds. Here Fechner’s principle of co-operation is applicable—namely, that two pleasure-exciting causes working together produce a result which is greater than their sum—and is so strong, in fact, as to extend the sphere of sound-play far beyond that of the sensuously agreeable. Absolute silence makes us uncomfortable, and, when it is lasting, conveys to the mind a special quality of emotion, as in optics there is a positive feeling of blackness. So it happens that we take pleasure in noise as such even when it is not agreeable. This applies especially to children. “Les bruits choquants, aigus, glappissants, grondant,” says Perez, “ne leur sont pas désagréable de la même manière qu-aux grandes personnes.” Marie G—— manifested in her third year the liveliest joy in the grinding and squeaking of an iron ring in her swing. To small boys it is a treat to hear a teamster crack his whip. My brother-in-law when a boy cherished for years the ambition to make all the electric clocks in our house chime in concert with a great musical clock. A sense of discomfort is produced sooner, however, by a variety of discordant sounds to which we are passively listening, than when the din is self-produced—a distinction which extends into the domain of art, as testifies many a piano virtuoso.