The Hindoos carried the theory of music to an extremely fine point, having many curious scales, some of them with twenty-four divisions in an octave. Twenty-two was the usual number. The pitch of each note in every mode was accurately calculated mathematically, and the frets of the vina located thereby, according to very old theoretical works by one Soma, written in Sanskrit at least as early as 1500 B.C. When this work first became known to Europeans, its elaboration led it to be regarded as a purely theoretical fancy piece, and it was thought to be impossible that practical musicians could have been governed by theories apparently so fine-drawn. A study of the structure of the vina, however, perfectly adapted to these theories, set all doubts at rest. None of the intervals of the Hindoo scale exactly correspond to our own. Harmony they never conceived. Well sounding chords are impossible in their scales. All their music was monodic--one-voiced. [Illustration: Fig. 16.] There was a curious development of the musical drama in India about 300 B.C., having certain of the traits of modern opera. Several of these ancient pieces have come down to us, but without the musical notes. They are long, consisting of as many as eleven acts, part of them sung, part spoken. Curiously enough, the different acts are not all in the same dialect. The musical acts are in Sanskrit, which had then ceased to be a spoken language for at least 500 years; the spoken acts were in Pakrit, a dialect of Sanskrit, which likewise had ceased to be spoken for several centuries. A fuller account of the Hindoo drama is given in Wilson's "Theater of the Hindoos." The curious circumstance of the drama of the Hindoos of this epoch is that it was contemporaneous with another very celebrated development of musical drama in Greece. Besides the primitive form of the bowed instrument, the ravanastron (Fig. 16), many forms more advanced are figured among the instruments from India in European museums, but as they are all of absurd and impossible acoustical conception, besides being most likely of comparatively modern origin, we do not present them at this point. Later, in the history of the violin, one or two of the most curious will be given. II.