A useful scale for playing in the third position is the Dorian scale or mode. Its degrees are 1, 2, b3, 4, 5, 6 and b7. It is shown here as the D Dorian scale, which can be played on the C harmonica.
Here is the D Dorian scale played first in the higher octave between holes 4 and 8, and then in the lower octave down to 1. As you play this scale, mentally name the scale degrees, remembering that D is the keynote instead of G.
The next two examples are traditional songs, derived from the Dorian scale. They are played in the third position.
Notice that this example is written in ^ time. This means there are only three beats per bar instead of four. For an introduction to ^ time, see Progressive Beginner Harmonica .