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16 OREM'S HARMONY BOOK
CHAPTEE V
INTERVALS
An Interval is the measure of the distance or difference in pitch between any two musical sounds.
An Interval may be formed by any two tones, either sounded simultaneously, or in succession. If sounded simultaneously, a Harmonic Interval is constituted; if, in succession, it is known as a Melodic Interval. 







An Interval is named according to the number of letters included. Thus, the Interval from C to D is called a Second, (two letters being concerned); from C to E is a Third, (three letters being concerned: C, D, E); in a like manner, from C to F is a Fourth, from C to G is a Fifth, etc.
Always reckon Intervals from the lower note upward, and count the number of letters, including those upon the notes out of which the Interval is formed.
When two voices or instruments sound the same tone, there is no difference in pitch. This is called a Unison or Prime. Strictly speaking, it is not an Interval at all.
Let us write out the Intervals to be found in the Scale of C Major, reckoning from the Tonic upward. 



Sing and play them all many times. Let the teacher or a student play them, and let the others endeavor to name them.
In a similar manner write out the Intervals in all the other Scales, using the proper Signatures. Then play and sing them and endeavor to name them as before. 

Intervals in all Scales 


