The two instruments bear a relation to each other, very similar to that of the two sycamore flutes illustrated and described in the last chapter, and evidently also the player chose one or the other according to the mode in which he intended to play, or, as we should say, the key in which the music lay; here, however, in these segmented flute pipes the method is not the same, the particular mode depends upon the section arrangements being fixed, and laid out for a succession of intervals quite distinct for each pipe. From the mouthpiece to the lower end the length is the same in each pipe, but the intervals that could be used in playing are not alike. Measure off the sections as in one pipe and it will be seen that no corresponding distances are found on the other; notice how differently the segments that are longest, representing a tone and a quarter or a tone and a half, come in each particular arrangement. The elevated plateau at the upper end is about three quarters of an inch in height, and the table-land at the top is about a quarter of an inch square, there being a little circular shaft drilled through the metal, leading into the body of the flute. This is to all appearance the mouthpiece, and, without questioning, I had formerly accepted the general notion that here we had specimens of the lip blown flute. The little aperture nearly a quarter inch in diameter would undoubtedly serve for blowing across, with the lip resting against the block. When, however, I came to examine these treasures of a lost art, with a view to understanding them, misgivings arose; for how could the scale be constructed, seeing that, in a lip blown cylindrical flute, the octave note would occur at the half of the length? At the fourth hole distant from the bottom opening, the note given would be the octave. No, this could not be. Moreover, the lay of the finger holes is so like that of the sycamore flute that one sees directly the correspondence, and is driven to the conclusion that we have here higher developed specimens of the reed blown aulos. [Illustration: _The Silkworm Flutes._ _Fig. 20._] Why have I named this the silkworm flute? Because the resemblance suggests itself. You will notice that the cylinder is segmented, as a caterpillar looks to be; and we know that the Greeks had a flute so peculiar that it was given the name of _Bombyx_, which is the name by which the silkworm caterpillar is known in science.