The Choirmaster's Manual/Chapter 6
CHAPTER VI
THE SCALES
Sing all major scales from C upward.
Exercise 13.
For words and loose jaw.

The jaw must be kept quite still and feel as if floating; the tongue must form consonants. Sing second time mf.
Exercise 14.

Twice each vowel, slowly at first, or the notes will not be distinct.
Exercise 15.

Major thirds are very hard to sing. Boys often get a little flat on them.
Exercise 16.

Slowly at first. See that the middle note is distinct.
Exercise 17.

Exercise 18.

In Exercises 16, 17, and 18 care must be taken not to unduly accentuate the first note of the group of three.
Exercise 19.
Staccato.
The staccato must be effected by a sharp inward movement of the abdomen, similar to an attack (see Chapter IV); but no breath must be taken between the notes.
Exercise 20.

Sing on all vowels, softly, paying particular attention to the staccato and slurred passages. Pause on last note.
Exercise 21.

Exercise 22.

Note. Sometimes a fuller resonance is obtained by using "na" for vocalizing; this combination is also very useful for making the tongue active.