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

[Ill.u.s.tration: Fig. 138.]

LESSON XXVI

[Ill.u.s.tration: 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

[Ill.u.s.tration: Fig. 140.]

LESSON XXVII

[Ill.u.s.tration: 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

[Ill.u.s.tration: Fig. 142.]

LESSON XXVIII

[Ill.u.s.tration: Fig. 143.]

EXERCISES

To cantus firmus _a_ write the fourth species in one part, as usual.

To cantus firmus _b_ write first, second and fourth species in the other three parts. [Fig. 143_a_.]

To cantus firmus _c_ write the first, third and fourth species in the other three parts. [Fig. 143_b_.]

To cantus firmus _c_ write fourth species mixed in the other parts. [Fig.

143_c_.]

CANTI FIRMI

[Ill.u.s.tration: Fig. 144.]

LESSON XXIX

[Ill.u.s.tration: Fig. 145.]

EXERCISES

To canti firmi _a_ and _b_ write fifth species in one part, as before.

CANTI FIRMI

[Ill.u.s.tration: Fig. 146.]