[Illustration:  Fig. 133.]

EXERCISES

To canti firmi a and b write the first species in the other parts.  Write each four times, setting the cantus firmus in each part in turn.

CANTI FIRMI

[Illustration:  Fig. 134.]

LESSON XXIV

[Illustration:  Fig. 135.]

EXERCISES

To cantus firmus a write the first species in all parts, as in the previous lesson.

To cantus firmus b write the second species in one part.  Write four times, and change with each solution, so that both the cantus firmus and the second species will appear in each part. [Fig. 135.]

CANTI FIRMI

[Illustration:  Fig. 136.]

LESSON XXV

[Illustration:  Fig. 137.]

EXERCISES

To cantus firmus a write second species in one part as previously directed.

To cantus firmus b write the first and second species mixed in the other three parts. [Fig. 137_a_.]

To cantus firmus c write third species in one part, as directed for the second species (b).

CANTI FIRMI

[Illustration:  Fig. 138.]

LESSON XXVI

[Illustration:  Fig. 139.]

EXERCISES

To cantus firmus a write the second species in two parts and the first in the others.  Write twice, changing the parts about. [Fig. 139_a_.]

To cantus firmus b write third species in one part as previously directed.

To cantus firmus c write third species mixed in the other three parts, as at Fig. 139_b_.

CANTI FIRMI

[Illustration:  Fig. 140.]

LESSON XXVII

[Illustration:  Fig. 141.]

EXERCISES

To cantus firmus a write the first, second and third species in the other three parts.  Write twice, changing the parts about [Fig. 141_a_.]

To cantus firmus b write fourth species in one part, as directed in previous lessons. [Fig. 141_b_.]

To cantus firmus c write third species mixed in the other three parts. [Fig. 139_b_.]

CANTI FIRMI

[Illustration:  Fig. 142.]

LESSON XXVIII