Peculiar interest attaches to this series of sounds, because in the Middle Ages they were supposed to be the _only_ sounds admitted by the Greeks. This accounts for the fact that B was the first note that it was considered right to use in two forms. =The Greek Scales=.—The Greeks did not by any means confine themselves to these sounds, but changed the pitch of the starting note just as we do with our scales; in other words, both of these systems might be transposed. Therefore they not only had all the sounds at command that we have, but as their scales were (theoretically, at least) tuned acoustically true, they had a great many more. But their scales were all diatonic (the scales they called Chromatic and Enharmonic will be explained later), they were all like our natural minor. When they said “Dorian Scale” they meant just what we mean when we say scale of D minor; Phrygian Scale meant E minor; Lydian Scale, F-sharp minor; Mixo-Lydian, G minor. In addition to these four scales there were three that began a fourth below, one a fourth below the Dorian, called the Hypo-Dorian, A minor; a fourth below the Phrygian, called the Hypo-Phrygian, B minor; and a fourth below the Lydian, called Hypo-Lydian, C-sharp minor; these were the standard scales of Greek music. These names, Dorian, etc., were retained in the Ecclesiastical System, but the mistake was made of supposing that the Greeks used only the fixed sounds given by the untransposed Greater System. Hence the Church Dorian has B natural, not B-flat; the Church Phrygian, F natural, not F sharp; and the Church Lydian begins on F natural, instead of on F sharp. Hence, no two church scales are alike in the positions of the halftones. QUESTIONS AND SUGGESTIONS. Name some of the myths connected with music among the Greeks. Consult a work on mythology. Name the musicians and philosophers connected with Greek music; arrange them in chronological order, with dates. State the successive points of development. Why do we consider that the history of music as we know it today begins with Greek music? Have we music that belongs to the Greek period? On what was the Greek Scale founded? How was this extended? What name did this form receive? In what respect did the Disjunct form differ from the Conjunct? What was the _Mese_? What was the Lesser Perfect System? What was the Greater Perfect System? What was the highest note used by the Greeks? What was the lowest? Were these systems transposable? What is the meaning of the prefix “Hypo”? LESSON IV. MUSIC OF THE GREEKS (_Concluded_). =The Greek Octave System=.—So far, everything is clear enough; but the next step is not quite so sure. The Greeks spoke of the Dorian Octave, the Phrygian Octave, and so on; and the word Octave, used in this way, has been thought to be synonymous with Scale, which is doubtful, for the following reasons: