SECOND SPECIES IN TWO PARTS


[Illustration: Fig. 101.]

The suggestions for second species in both parts, in two-part counterpoint,
apply for the two parts having the second species in three-part
counterpoint.

Accidental harmonies sometimes appear on the weak beat. All tones in this
accidental harmony foreign to the chord on the strong beat must be treated
as dissonances. This must be regarded whenever two or more parts have other
than the first species. [Fig. 102.]

[Illustration: Fig. 102.]

At Fig. 102_a_, the accidental harmony _f-a-c_ is on the weak beat. The _f_
and _a_, being foreign to the chord _c-e-g_ on the strong beat, are
correctly treated as dissonances. At _b_, the _f_ and _a_ are left by skip,
which is not permitted.

The second species may be written continuously in all parts; the tones
appearing on the weak beat must be harmonically related to one another, and
those foreign to the chord on the strong beat must be treated as
dissonances. [Fig. 103.]

[Illustration: Fig. 103.]

The first and second species may be mixed, as in Fig. 104.